JavaScript Metroidvania
Run, jump and slash through a hand-drawn pixel castle.
Desktop recommended — this build is played with a keyboard.
About this build
JavaScript Metroidvania is a 2D metroidvania platformer. Setting: haunted castle. Style: pixel art. It runs entirely in the browser and loads no account, no install and no runtime model call.
- GENRE
- metroidvania platformer
- SETTING
- haunted castle
- STYLE
- pixel art
- PLAYERS
- single player
- INPUT
- keyboard
- LICENCE
- MIT
Why it's on the shelf
A compact pixel-art metroidvania built with Kaboom: run, double jump, slash, and open a castle one room at a time. It fills the platformer gap and shows how far a small JavaScript engine can carry a genre.
How to play
Arrow keys to move, X to jump, Z to attack, Enter to start. Click the frame once if the game needs keyboard focus, and use the fullscreen button above for a bigger view.
- jumping
- double jump
- combat
- exploration
- health
Paid service
Change the theme, the twist, or the whole brief
The build above is the shelf version. If you want it re-skinned for your brand, retuned for a different audience, or extended with new mechanics, we quote each job by hand and deliver a new standalone build.
- Re-skin — palette, sprites, audio, logo and end screen.
- Retune — difficulty curve, level length, controls, mobile layout.
- Extend — extra enemy types, modes, scoring, save data.
Paid exports and rebuilds are in development. Nothing is charged yet — browse and play the shelf while we finish the request desk.
Source and licence
This build is adapted from https://github.com/JSLegendDev/JavaScript-Metroidvania, made by JSLegend and released under the MIT licence. The licence text ships inside the build folder.
adapted from JSLegend (MIT)
Build checked in Chrome on 15 Nov 2026. If it fails to load, tell us.