I am making my own platformer game with a custom engine, with the hope of eventually adding user editable levels and WebRTC based multiplayer.

https://infinitower.suldashi.com

There are no mobile controls at the moment, and movement is done via WASD keys. There are not many features at the moment since I’ve been focusing on the core engine functionality, but the development process has been very rewarding and educational.

I also want to use this material to write a series of tutorials or maybe even a small book.