Who are you - a frictionless cube with no tread!
The idea is alright, but this is one of the more frustrating platformers I have played. You have to get the cube pixel perfect in order to make a jump, sometimes, the cube skids when it lands, the levels seem to time out on you, and I have been killed by the smoke despite it not even touching the cube. It is way too frustrating! As for what I like, I like how the levels destruct when you hit that teleporter. At first, it seems you are trapped in an endless cycle, but then, what's that?... That's pretty cool.
Remove the room timelimit.
I've no idea how to get past lvl 5, running into the box seems to do nothing, neither does standing still. Space, E or Mouse do nothing..
The game has a little unusual control. I forgot to mention it. You need to shoot at the target - the S key or the down arrow. You have not passed half the game, maybe you change your mind.