Gets repetitive and tedious after a while...
The game itself is interesting, though rather heavy on resources even without debris. However, after a certain time, it begins getting rather repetitive, and the eventual repetition of the final white block of a wave exploding into many when destroyed becomes rather tedious after the first two times.
I'm not much for that type of music, although my musical preferences isn't of much relevance. The music's loop, though, sounds a bit sudden and rough, if I recall it correctly.