I liked the warp mechanic, it's a nice idea. I would definitely switch to particles for the effects, I've got a good PC and it was slowing down wildly whenever I warped. The platforming feels very sluggish and floaty which isn't great for the precision required for some of the jumps. Also an indicator showing where my warp would end up would be really nice and help with the "oops I warped too far" kind of moments. And one shot kill is kinda cheap =P The game is already quite hard, so being able to take a few hits before game over would be a welcome addition.
With polish this game would definitely be quite fun to play, I'd imagine! Good job!