This game has a really amazing concept! I love the idea of mirroring your enemies weapons and the fact that the grass would react too was a nice touch!
My one suggestion is to speed up the blue beetle enemies bullets. Whenever I had that ability, I would have to get really close to enemies with faster bullets in order to hit anything which made it nearly impossible to react in time. Maybe that's just a skill issue on my part though LOL
Overall it's a great game! Good job :)