Thank you for playing and taking your time to write this review, it's very helpful!
If I keep developing this game I think adding variety to the waves and enemies is something I will do first! And making killing them more satisfying with animations :) Also look into the bug you found when placing fishes in the end zone, haha!
Thank you for your feedback for the UI as well. It's something I haven't practiced a lot and I tried to put some time into learning that for this jam, I will implement smoother transitions next time. Thank you again so much for playing! I left a comment on your game too, it was awesome.