Hi, I wanted to clarify if I can use an engine I’ve been developing since before the jam started. I’d be using this instead of something like unity or Godot, and it doesn’t have any content in it just a bunch of utilities basically. However, it is technically code I’d written before the jam so I could see the ruling go either way.

As long as the engine is open-source, it would fall under using free assets - you should be fine.