Let's see...
Good points:
*Good graphics. I can see you've been working on this game.
*Interesting concept
*Good physics
Bad points:
*There's no Main Menu. EVERY game needs a Main Menu. Or at least a title screen.
*The level select screen comes up after every level. Which is pointless. The game should automatically advance to the next level, and should only come up with the Level Select screen when you press Play or hit Exit Level.
*The levels take too long to complete, and there's little input. Level 2 took me 50 seconds, not because it was hard, but because it takes that long. It's impossible to go any faster. It just gets boring.
*There should be pop-ups at the start of certain levels explaining what certain things do. Some people might not realize, for example, that you have to click the moving platform on Level 3 to make it go back down (why it's going up in the first place is a complete mystery to me). I know that's what the walkthrough's for, but there's some people (like me) who just can't be bothered to use them. Which is why I'm stuck on Level 3 (the swingy hammer thing seems to be on the wrong side).
So overall, an interesting game, with the makings of a good game. It just needs a lot of work to get up to a good standard. 3/5 6/10 and looking forward to better things in the future.