Wow, you played till 30?? You might have a world record haha!
Thanks for the suggestions, I will surely take a look at this once the jam voting ends. I'm planning to release an updated version right after, with rebalancing and better art.
I don't think I tested passed wave 15 myself. It was more about having something ready for the jam that people could enjoy for 10-15 minutes!
Cheers!