Input Keys

This reference details the keyboard key codes used in Ludens to map physical or on-screen actions to the RPG Maker MV/MZ engine.

When you configure the Input Key property of an on-screen button (A, B, X, Y) in the Settings menu, you are assigning one of these numeric codes.

How it Works Under the Hood

Because mobile devices lack physical keyboards, Ludens bridges its native Compose UI buttons to the game’s web environment. When you press an on-screen button, the app dispatches a JavaScript snippet via evaluateJavascript to the WebView. This snippet directly calls the engine’s input handler (Input.js) for the specific event type (e.g., keydown, keyup) and passes a pseudo event, avoiding the need to dispatch synthetic DOM events.

Movement & Control Keys

The following table lists the primary keys used for character movement and game interaction.

Key Name	Code	Typical RPG Maker MV Default Action	Typical RPG Maker MZ Default Action
Enter	13	OK / Action	OK / Action
Escape	27	Cancel / Menu	Cancel / Menu
Up	38	Move Up	Move Up
Down	40	Move Down	Move Down
Left	37	Move Left	Move Left
Right	39	Move Right	Move Right
Shift	16	Dash / Run	Dash / Run
Control	17	Special Control	Special Control
Alt	18	Special Control	Special Control

Graphics Keys

These keys are primarily used for system and graphics-related commands within the engine.

Key Name	Code	RPG Maker Function
F2	113	Show/Hide FPS Counter
F3	114	Toggle Stretch Mode
F4	115	Toggle Fullscreen (PC only)

Tip

While F4 is historically used for fullscreen on desktop, it usually has no effect or behaves differently inside a mobile WebView context.