Simple design but very well made. I like the effects of the lasers and all the particles, it takes the game to the next level. The use of color is also good, it makes it easier to separate what is what :)
My feedback is:
the players particles dissapears in an instant, maybe make it so they fade away in opacity or size to make it less noticable.
The laser only harms the player and not the enemies, i think that if that the lasers also harm the enemies, it would make the lasers seem even more dangerous.