Uh, the guy's snorkel is under the green liquid, is he okay (besides the virtual reality torture stuff)? xD
Okay here are some thoughts about the game: the level design is pretty good; the low amount of mechanics were used quite effectively. Landing on/dropping through the moving platforms added a a sort of timing (even a rhythm at times) aspect to the game which I thought was fun. It's great that the platforms reset when you die because otherwise that would get pretty tedious. I also appreciate the amount of checkpoints.
I kinda found the controls a bit wonky though. Sometimes I felt like my inputs weren't registering, maybe it is just a lack of input buffering which I'm used to? Also the air friction seems a bit finicky, although it actually kinda made some interesting gameplay. :P