I think that the Radar from Mr. Bloom's shop should have an additional benefit of that 2 rounds before a new enemy type begins appearing in a level, next to the round counter, it should say "INCOMING DANGER" with the enemies coming next to it. It'd help a lot more than what the current Radar does (Either that, or when clicking on the Radar when the trashie select menu is pulled up, instead of just revealing the enemies coming in the level, it should also say which round they're coming). Also it might just be me but getting the currency for Mr. Bloom's shop feels like pain, and Radar feels way to weak to be in the shop. Though for what the game currently is, it's amazing! I love how hard it is, too.