I have completed your game. It was very enjoyable and fun to play. I wished a little bit more content, but as far it's a solid game. Sometimes it was a little bit inconsistent, because in level 2 I could sometimes walk on the stones, and sometimes I triggered them. I love the music. The last part could be a little bit longer, because it was my favorit and it matched the flow of the creeps perfectly.
I would love it, if you could try out my game as well =)