I like the artwork, and the music is good, but it should be a little louder. I think the difficulty is good, but I had no idea that the red lights turn off the lasers in the first level until I watched your video. I suggest making that a bit more obvious. Also, if you're going to make a tough platformer, I think the respawn time needs to be a lot quicker, like Super Meat Boy or They Bleed Pixels. But overall, well done!