This is an amazing game! The gameplay is so smooth and addictive, having variety of upgrades lets you keep going for a long time.
Apart from game play, it looked great! The post processing, the particles, the lighting, everything was amazing, It looks like like a full fledged mobile game. Add some touch control and just release it on google play as it is :D
I also really liked the idea of being able to change music and the "mood" of the level whenever you want.
I want to give useful and honest feedback but I couldn't find any issues or anything wrong with the game. Great job!