Couple more things: Should be able to rotate and move laterally simultaneously; should be able to nudge bricks into each other to shore up your stack (but the friction between vertical surfaces is too great); trophies are unexplained.
My game ended without me knowing why...probably because a piece down below fell out. That's a problem and deeply unrewarding. (Boom. Game over.) The concept and gameplay is awesome though. There's no benefit that I can see to "matching pieces"...so that could be fixed. If it's just points, don't bother...it just detracts from gameplay.
Great concept! Could use a little more something to take it over the top...varying size blocks (with different weights)...more shapes (rounds?)...specials blocks...that kind of stuff.
The tracks don't really scale well. There are extremely difficult portions in early levels then it gets easy for a few levels, then it's impossible again. Some areas, like the gap after the huts in Level 8, are so frustrating I probably won't continue playing.
The bouncing action is irritating. I'd rather it be running while the previous block is in the air rather than having to wait for it. Some of the collision detection seems off and the "draw" line is too easy to run off the flash window.
When I was just a boy my dream was to become a colorful tornado and race other tornados around simple tracks. The missles and stuff are just a bonus! (Game doesn't bring anything new to the racing genre...try again.)
Pet peeves: When racing go-karts, the one thing you do a lot of is slide to sluff speed. There's no handbrake on a kart. Also, damn, those tracks are narrow.