Since this game is in the more or less early development, I will only accept pull requests which add an immediate benefit. Please understand that low quality PR's might be closed by me with a short comment explaining why.
This project is based on ES5. Some ES2015 features are used but most of them are too slow, especially when polyfilled. For example, `Array.prototype.forEach` is only used within non-critical loops since its slower than a plain for loop.
You will need a <ahref="https://www.codeandweb.com/texturepacker"target="_blank">Texture Packer</a> license in order to regenerate the atlas. If you don't have one but want to contribute assets, let me know and I might compile it for you.