New update is awesome!!!
It certainly makes the game a lot more balanced and removes a lot of the cheese, bringing back the fun. There's still a lot more you can add, like more maps (maybe they can each have they're own gimmicks e.g: the direction the balloons come from changing), more enemies(perhaps some that are more unique) and towers (maybe some that use multiple currencies?), more modes(difficulty modes would be nice, since the game is quite hard (which I get is intentional but worse players might dislike the game if they're finding it difficult to get though the first few waves); perhaps some arcade modes, like a no waves mode; and I could see multiplayer being quite fun so maybe? not sure how that would work though) and some more polish. This game has a lot of potential and what you've done in a few weeks is incredible, keep up the good work!!