nngn

This is a free and open source 2d simulation / game engine.

Get the source code on github.

Watch the demo here or on youtube.

Live demo

Try it without installing or compiling anything here.

Warning: this is an experimental build. It works pretty well, but there might be issues that are not present in the real build. The console can be informative if things do go wrong. It will also download approximately 25MB of data.