This is a really well-made Portal-esque game! The grappling hook aspect was a fun and interesting mechanic to use, and I spent quite some time just messing around the chambers with it lol Something like an "endless" mode where you'd have a huge chamber with those blue things everywhere would be something I'd definitely want to try out.
My only problem is that the player tends to slide when I stop moving, so the game has that sort of "ice floors" feel to it. This was troublesome in the lava levels, but not that much of an issue elsewhere. I did encounter some problems where the fans seemed to shut off at random, but I'm not sure if that was a bug or design. I can't wait to see the full version!
Please check out and rate my game. =)