I don't like this use of the theme. After all, many games can be operated using only the mouse. And the ever expanding level effect would have worked if the theme of the level didn't change, and your third "argument" isn't even worth mentioning.
Apart from that, I do think this game is really cool! I've tried to create an area fill function myself and it worked awfully. Your approach seems much simpler and works and feels perfect!
I like the enemies diffrent behaviours. It kind of gives them personality which is great for a jam game.
The sound and music is awesome.
I like the name. If it was a rating category, I would give it 5/5
Some game design things I suggest:
- Touching enemies should kill or damage you.