Gravity Gun!
Nice, gravity gun is very innovative, hope to see something like that in games more often, wow. Speaking of which, Its kinda weird how you have the gravity gun and then all of the sudden you lose it for level 3, until you beat the boss and get it again, I just killed the level 4 boss and On level 4 I had the gravity gun when I first started the level, kinda not consistent gameplay.
Its like a new toy. But I'm kinda disappointed in the auto wall jump. I got rather good at wall jumping and find it fun now thanks to Mario 64, but I can understand why you did it. Still 5/5, 9/10.
I died once during level 2 if thats what you meant, however having something that kills you instantly in a level that hasn't been in the game yet is probably always gonna kill someone the first time. Grr. Red lasers.