This is a fun game with a nice tower defence kind of vibe. It started plain and simple, but got harder quickly. The main issues I had were with the game's camera and panning. Without reading the instructions, it is not entirely clear that you are expected to move it in order to kill all the bugs (seeing the other comments now, I imagine other people fell for this trap as well). Using the WASD keys was much more convenient than the directional keys, so IMO the former should be documented before the latter.
Overall, it was pretty good! Lost with a score of 78k. x)