The game was so easy to understand I didn't even read the tutorial. I feel like the pace at which you introduced new mechanics in the level was perfect. The movement of the character was perfect and made you feel in the shoes of the robot. The gun was definitely my favorite part, as I could make good use of it to move around the level, sometimes even skipping some obstacles entirely. I believe the gun added a good amount of play-style varieties.
Everything from level, game, to art design felt incredible.
The only thing that bothered me is that sometimes my character would not wall jump, and sometimes it would. Turns out wall jumping is bugged when using the 'W' key instead of the 'SPACE' key. Hope you can look into it:D