There seems to be some bug. Sometimes when I click i don't fire anything and sometimes when I'm yellow and I shoot the blue it still counts.
And also I don't think you should have the powerup icon be a ? in the corner. I thought it was a help button.
I'm not sure if the player is actually moving around or if it's just the particle effects but it didn't make too much sense to me
However I loved the retro style you've got going on and I think the trippy effects are amazing! Definitely changed things up and made it a bit more challenging!