The overall experience is challenging and fun and you build up a full game experience. I like the simple idea, and it is hard to get to the later levels.
At first, it was kind of overwhelming for me, but the core loop works. After I figured everything out, it was a good experience.
Every indicator is there and the UI is doing its job, but I think the game could guide me a little more through the mechanics. The UI looks good and shows everthing but it could be a little less overwhelming and show the important information more clearly. Alternatively, it could build up over the levels to give a smoother introduction. Maybe the first levels could work more like a tutorial that introduces the mechanics.
I like the soundtrack! It sets a good mood for the game. But the game over music shocked me every time. It was a little loud ;D
Thanks for the entry!