Appreciate the feedback, I updated the game so that each level ramps up in difficulty as time progresses... except for level 9, that one is just supposed to be hard.
ah, when i mentioned arcade-style gameplay, i meant something that wasn't level-based, wherein you play a single round that gets progressively harder. sorry about that, should've been a little more specific.
you don't have to change it entirely though, i still appreciate you changing it from my feedback. i think it's a good starter game :)