diff --git a/src/game/events.ts b/src/game/events.ts
index 1c53f17..78219fd 100644
--- a/src/game/events.ts
+++ b/src/game/events.ts
@@ -9,15 +9,45 @@ import type { App, Ref } from "vue";
 import { watch } from "vue";
 import type { GenericLayer } from "./layers";
 
+/** All types of events able to be sent or emitted from the global event bus. */
 export interface GlobalEvents {
+    /**
+     * Sent whenever a layer is added.
+     * @param layer The layer being added.
+     * @param saveData The layer's save data object within player.
+     */
     addLayer: (layer: GenericLayer, saveData: Record<string, unknown>) => void;
+    /**
+     * Sent whenever a layer is removed.
+     * @param layer The layer being removed.
+     */
     removeLayer: (layer: GenericLayer) => void;
+    /**
+     * Sent every game tick. Runs the life cycle of the project.
+     * @param diff The delta time since last tick, in ms.
+     * @param trueDiff The delta time since last tick, in ms. Unaffected by time modifiers like {@link game/player.Player.devSpeed} or {@link game/player.Player.offlineTime}. Intended for things like updating animations.
+     */
     update: (diff: number, trueDiff: number) => void;
+    /**
+     * Sent when constructing the {@link Settings} object.
+     * Use it to add default values for custom properties to the object.
+     * @param settings The settings object being constructed.
+     * @see {@link features/features.setDefault} for setting default values.
+     */
     loadSettings: (settings: Partial<Settings>) => void;
+    /**
+     * Sent when the game has ended.
+     */
     gameWon: VoidFunction;
+    /**
+     * Sent when setting up the Vue Application instance.
+     * Use it to register global components or otherwise set up things that should affect Vue globally.
+     * @param vue The Vue App being constructed.
+     */
     setupVue: (vue: App) => void;
 }
 
+/** A global event bus for hooking into {@link GlobalEvents}. */
 export const globalBus = createNanoEvents<GlobalEvents>();
 
 let intervalID: NodeJS.Timer | null = null;
@@ -103,6 +133,7 @@ function update() {
     }
 }
 
+/** Starts the game loop for the project, which updates the game in ticks. */
 export async function startGameLoop() {
     hasWon = (await import("data/projEntry")).hasWon;
     watch(hasWon, hasWon => {
diff --git a/src/game/layers.tsx b/src/game/layers.tsx
index 2ecae92..404d72c 100644
--- a/src/game/layers.tsx
+++ b/src/game/layers.tsx
@@ -53,11 +53,20 @@ export const BoundsInjectionKey: InjectionKey<Ref<DOMRect | undefined>> = Symbol
 
 /** All types of events able to be sent or emitted from a layer's emitter. */
 export interface LayerEvents {
-    /** Sent every game tick, before the update event. Intended for "generation" type actions. */
+    /**
+     * Sent every game tick, before the update event. Intended for "generation" type actions.
+     * @param diff The delta time since last tick, in ms.
+     */
     preUpdate: (diff: number) => void;
-    /** Sent every game tick. Intended for "automation" type actions. */
+    /**
+     * Sent every game tick. Intended for "automation" type actions.
+     * @param diff The delta time since last tick, in ms.
+     */
     update: (diff: number) => void;
-    /** Sent every game tick, after the update event. Intended for checking state. */
+    /**
+     * Sent every game tick, after the update event. Intended for checking state.
+     * @param diff The delta time since last tick, in ms.
+     */
     postUpdate: (diff: number) => void;
 }
 
diff --git a/src/game/notifications.ts b/src/game/notifications.ts
index 9dd3831..4d87daf 100644
--- a/src/game/notifications.ts
+++ b/src/game/notifications.ts
@@ -4,6 +4,12 @@ import "vue-toastification/dist/index.css";
 
 globalBus.on("setupVue", vue => vue.use(Toast));
 
+/**
+ * Gives a {@link CSSProperties} object that makes an object glow, to bring focus to it.
+ * Default values are for a "soft" white notif effect.
+ * @param color The color of the glow effect.
+ * @param strength The strength of the glow effect - affects its spread.
+ */
 export function getNotifyStyle(color = "white", strength = "8px") {
     return {
         transform: "scale(1.05, 1.05)",
@@ -13,6 +19,7 @@ export function getNotifyStyle(color = "white", strength = "8px") {
     };
 }
 
+/** Utility function to call {@link getNotifyStyle} with "high importance" parameters */
 export function getHighNotifyStyle() {
     return getNotifyStyle("red", "20px");
 }
diff --git a/src/game/persistence.ts b/src/game/persistence.ts
index 9f7303d..b871fbf 100644
--- a/src/game/persistence.ts
+++ b/src/game/persistence.ts
@@ -8,15 +8,32 @@ import { ProxyState } from "util/proxies";
 import type { Ref } from "vue";
 import { isReactive, isRef, ref } from "vue";
 
+/**
+ * A symbol used in {@link Persistent} objects.
+ * @see {@link Persistent[PersistentState]}
+ */
 export const PersistentState = Symbol("PersistentState");
+/**
+ * A symbol used in {@link Persistent} objects.
+ * @see {@link Persistent[DefaultValue]}
+ */
 export const DefaultValue = Symbol("DefaultValue");
+/**
+ * A symbol used in {@link Persistent} objects.
+ * @see {@link Persistent[StackTrace]}
+ */
 export const StackTrace = Symbol("StackTrace");
+/**
+ * A symbol used in {@link Persistent} objects.
+ * @see {@link Persistent[Deleted]}
+ */
 export const Deleted = Symbol("Deleted");
 
-// Note: This is a union of things that should be safely stringifiable without needing
-// special processes for knowing what to load them in as
-// - Decimals aren't allowed because we'd need to know to parse them back.
-// - DecimalSources are allowed because the string is a valid value for them
+/**
+ * This is a union of things that should be safely stringifiable without needing special processes or knowing what to load them in as.
+ * - Decimals aren't allowed because we'd need to know to parse them back.
+ * - DecimalSources are allowed because the string is a valid value for them
+ */
 export type State =
     | string
     | number
@@ -25,10 +42,20 @@ export type State =
     | { [key: string]: State }
     | { [key: number]: State };
 
+/**
+ * A {@link Ref} that has been augmented with properties to allow it to be saved and loaded within the player save data object.
+ */
 export type Persistent<T extends State = State> = Ref<T> & {
+    /** A flag that this is a persistent property. Typically a circular reference. */
     [PersistentState]: Ref<T>;
+    /** The value the ref should be set to in a fresh save, or when updating an old save to the current version. */
     [DefaultValue]: T;
+    /** The stack trace of where the persistent ref was created. This is used for debugging purposes when a persistent ref is created but not placed in its layer object. */
     [StackTrace]: string;
+    /**
+     * This is a flag that can be set once the option func is evaluated, to mark that a persistent ref should _not_ be saved to the player save data object.
+     * @see {@link deletePersistent} for marking a persistent ref as deleted.
+     */
     [Deleted]: boolean;
 };
 
@@ -42,6 +69,11 @@ function getStackTrace() {
     );
 }
 
+/**
+ * Create a persistent ref, which can be saved and loaded.
+ * All (non-deleted) persistent refs must be included somewhere within the layer object returned by that layer's options func.
+ * @param defaultValue The value the persistent ref should start at on fresh saves or when reset.
+ */
 export function persistent<T extends State>(defaultValue: T | Ref<T>): Persistent<T> {
     const persistent = (
         isRef(defaultValue) ? defaultValue : (ref<T>(defaultValue) as unknown)
@@ -65,6 +97,12 @@ export function persistent<T extends State>(defaultValue: T | Ref<T>): Persisten
     return persistent as Persistent<T>;
 }
 
+/**
+ * Mark a {@link Persistent} as deleted, so it won't be saved and loaded.
+ * Since persistent refs must be created during a layer's options func, features can not create persistent refs after evaluating their own options funcs.
+ * As a result, it must create any persistent refs it _might_ need.
+ * This function can then be called after the options func is evaluated to mark the persistent ref to not be saved or loaded.
+ */
 export function deletePersistent(persistent: Persistent) {
     if (addingLayers.length === 0) {
         console.warn("Deleting a persistent ref outside of a layer. Ignoring...", persistent);
diff --git a/src/game/player.ts b/src/game/player.ts
index fae969c..aa4e789 100644
--- a/src/game/player.ts
+++ b/src/game/player.ts
@@ -6,24 +6,40 @@ import { reactive, unref } from "vue";
 import type { Ref } from "vue";
 import transientState from "./state";
 
+/** The player save data object. */
 export interface PlayerData {
+    /** The ID of this save. */
     id: string;
+    /** A multiplier for time passing. Set to 0 when the game is paused. */
     devSpeed: number | null;
+    /** The display name of this save. */
     name: string;
+    /** The open tabs. */
     tabs: Array<string>;
+    /** The current time this save was last opened at, in ms since the unix epoch. */
     time: number;
+    /** Whether or not to automatically save every couple of seconds and on tab close. */
     autosave: boolean;
+    /** Whether or not to apply offline time when loading this save. */
     offlineProd: boolean;
+    /** How much offline time has been accumulated and not yet processed. */
     offlineTime: number | null;
+    /** How long, in ms, this game has been played. */
     timePlayed: number;
+    /** Whether or not to continue playing after {@link data/projEntry.hasWon} is true. */
     keepGoing: boolean;
+    /** The ID of this project, to make sure saves aren't imported into the wrong project. */
     modID: string;
+    /** The version of the project this save was created by. Used for upgrading saves for new versions. */
     modVersion: string;
+    /** A dictionary of layer save data. */
     layers: Record<string, LayerData<unknown>>;
 }
 
+/** The proxied player that is used to track NaN values. */
 export type Player = ProxiedWithState<PlayerData>;
 
+/** A layer's save data. Automatically unwraps refs. */
 export type LayerData<T> = {
     [P in keyof T]?: T[P] extends (infer U)[]
         ? LayerData<U>[]
@@ -52,6 +68,7 @@ const state = reactive<PlayerData>({
     layers: {}
 });
 
+/** Convert a player save data object into a JSON string. Unwraps refs. */
 export function stringifySave(player: PlayerData): string {
     return JSON.stringify(player, (key, value) => unref(value));
 }
@@ -133,6 +150,7 @@ declare global {
         player: Player;
     }
 }
+/** The player save data object. */
 export default window.player = new Proxy(
     { [ProxyState]: state, [ProxyPath]: ["player"] },
     playerHandler
diff --git a/src/game/settings.ts b/src/game/settings.ts
index af295c4..cad4438 100644
--- a/src/game/settings.ts
+++ b/src/game/settings.ts
@@ -6,11 +6,17 @@ import LZString from "lz-string";
 import { hardReset } from "util/save";
 import { reactive, watch } from "vue";
 
+/** The player's settings object. */
 export interface Settings {
+    /** The ID of the active save. */
     active: string;
+    /** The IDs of all created saves. */
     saves: string[];
+    /** Whether or not to show the current ticks per second in the lower left corner of the page. */
     showTPS: boolean;
+    /** The current theme to display the game in. */
     theme: Themes;
+    /** Whether or not to cap the project at 20 ticks per second. */
     unthrottled: boolean;
 }
 
@@ -40,7 +46,12 @@ declare global {
         hardResetSettings: VoidFunction;
     }
 }
+/**
+ * The player settings object. Stores data that persists across all saves.
+ * Automatically saved to localStorage whenever changed.
+ */
 export default window.settings = state as Settings;
+/** A function that erases all player settings, including all saves. */
 export const hardResetSettings = (window.hardResetSettings = () => {
     const settings = {
         active: "",
@@ -53,6 +64,12 @@ export const hardResetSettings = (window.hardResetSettings = () => {
     hardReset();
 });
 
+/**
+ * Loads the player settings from localStorage.
+ * Calls the {@link GlobalEvents.loadSettings} event for custom properties to be included.
+ * Custom properties should be added by the file they relate to, so they won't be included if the file is tree shaken away.
+ * Custom properties should also register the field to modify said setting using {@link registerSettingField}.
+ */
 export function loadSettings(): void {
     try {
         let item: string | null = localStorage.getItem(projInfo.id);
@@ -80,17 +97,23 @@ export function loadSettings(): void {
     } catch {}
 }
 
+/** A list of fields to append to the settings modal. */
 export const settingFields: CoercableComponent[] = reactive([]);
+/** Register a field to be displayed in the settings modal. */
 export function registerSettingField(component: CoercableComponent) {
     settingFields.push(component);
 }
 
+/** A list of components to show in the info modal. */
 export const infoComponents: CoercableComponent[] = reactive([]);
+/** Register a component to be displayed in the info modal. */
 export function registerInfoComponent(component: CoercableComponent) {
     infoComponents.push(component);
 }
 
+/** A list of components to add to the root of the page. */
 export const gameComponents: CoercableComponent[] = reactive([]);
+/** Register a component to be displayed at the root of the page. */
 export function registerGameComponent(component: CoercableComponent) {
     gameComponents.push(component);
 }
diff --git a/src/game/state.ts b/src/game/state.ts
index 00934c4..bda0b6a 100644
--- a/src/game/state.ts
+++ b/src/game/state.ts
@@ -1,9 +1,14 @@
 import { shallowReactive } from "vue";
 
+/** An object of global data that is not persistent. */
 export interface Transient {
+    /** A list of the duration, in ms, of the last 10 game ticks. Used for calculating TPS. */
     lastTenTicks: number[];
+    /** Whether or not a NaN value has been detected and undealt with. */
     hasNaN: boolean;
+    /** The location within the player save data object of the NaN value. */
     NaNPath?: string[];
+    /** The parent object of the NaN value. */
     NaNReceiver?: Record<string, unknown>;
 }
 
@@ -13,6 +18,7 @@ declare global {
         state: Transient;
     }
 }
+/** The global transient state object. */
 export default window.state = shallowReactive<Transient>({
     lastTenTicks: [],
     hasNaN: false,