I don't want to fuss with a feature filled game engine. Does anyone have any suggestions of a code-based game engine that waaaay simplifies and restricts you in some way?

I really want to make a game based on strict limitations but to write it in code and not some graphical editor.

I'm two hours in witu phaserjs and I've just done boilerplate with cameras and scenes. It looks great but it's overkill for me.

Edit: thank you all. So many great leads here.