this is a really cool game concept! i particularly like the balancing act of choosing how much money to use per attack. I think you could push this even further; give me some way (mouse wheel?) to control my money-per-attack mid round
I also would really like to see an auto-collect feature at the end of the rounds; I think it's one of the most satisfying moments in these types of games, and it feels like it's just an artificial buff to the magnet upgrades
also I love the way the character moves haha. this game was a lot of fun, thank you!