I really like how you've used particles in this game. As a background they work super well. I was a bit confused at first but once I actually stopped and read the instructions (I like that you let the player test it out in the main menu) then it made sense and I got into the flow of it, really cool! I think my only big suggestion would be that the enemies felt a bit too, smokey? Like, non-substantial and kinda hard to see when things get chaotic in the later levels. Apart from that, it's a really cool game :). Oh btw, the music reminded me big time of Mario :o