Not bad for a 3 day game jam! I really enjoyed the angle you took with making the lasers disappear and hide behind the background. I did feel that the mouse control for player movement was a bit quick, and a couple times I died, because I wasn't prepared for a new wave to spawn, so I was at the top of the level when they did. An indicator for when a new wave would appear would have helped quite a bit!
Overall, I can appreciate this submission and I think you did great for a 3 day jam. Thank you for the game!