I really liked your interpretation of the theme of waves. The gameplay was fun and I can see how you plan on expanding on it in the future. I had a couple of bugs (like software bugs not in game bugs lol) like clicking the start button after it had already started and one of the bugs getting caught in a corner and being unable to move at the very end of the level. Also when I died halfway through the level, it seemed like I could spawn the bugs anywhere but when I clicked, it took my energy but didn't spawn any bugs.
Despite these couple of bugs, I did have fun watching my troups blast through the enemy soldiers. I can see real potential in this game - especially with the art direction. You used the art assets well. I didn't see an indication that you used them from somewhere else so if you made them, they had a lot of charm to them. Even if you didn't make them, I loved the way that you put them together to make the level with variable heights instead of just a flat plane. Keep up the good work!