Great game! Superb music and sound cohesion with the art and overall style, well balanced dynamics and good composition all round. I felt like at first the balance was super unforgiving, finding my win/lose state dependent on which enemy types spawned before I hit the next 20 currency, but after that, it became incredibly easy, and I didn't really have to try very hard for the turrets to just completely goombaslap everything, and I ended up just kind of playing a waiting game for the money to add up, since I wasn't having to think. The sound, visuals and music were good enough to keep me playing till the end though, so great job there!