Any tricks for getting the timing of the trapdoor/fire powers? I've been attempting to beat this level for almost half an hour now, and I can't seem to stop...
Also this is probably the coolest game I've ever played, so kudos to the creators.
My suggestion would be to start to the left of the fire block, then run to the right (and give it a glancing blow). Keep on heading right, bounce off the wall, and come back again. That'll get you close... you may have to gain a bit extra time -- so you can overshoot the door on your way back, then stop, turn around, and then melt all 4 of the blocks.
As for stopping, make sure you're using the spacebar on levels like this, that lets you dump all your kinetic energy very quickly.