GREAT idea for a game, it's quite fun. However, I think you might lack a bit of experience with working out the bugs and problems with the levels/rooms. I found I got QUITE frustrated in rooms such as the vertical shaft leading to the first fan room, and the first wind/fan room itself, the first lava room, and the entrance to the cloud area. Most of the jumps and flights are only pixel-perfect, and if you don't get it just right, it won't work. This, I have to say, leads to a LOT of frustration!!!
as the title says......NICE!!!