I love the game -- i got busted at ~lvl19 where the economy fell off and the really tanky guys dodged my freeze-and-lightning mass killing tunnel in the beginning :D i felt like i had very little income in lvl18 when i needed it most to keep advancing. also, lack of health bars made me so anxious of the tank guys. i am saying a lot of things, but it's just because i loved the game so much I am criticizing it as if it is a fully complete game that you could ask money for! if you polished the communication of game state as well as add sounds, I could see myself paying a few bucks for this game! i loved the simple currency system otherwise, it was really cute and engaging :D