To do 5-2 without deaths constantly jump once you have picked up the key, it worked for me, the vehicle just went over the spikes without the extra weight. It may take a few tries, but I've finally got the impossible badge
Also, the physics are made worse by this..
I was aiming to get 600 height by cancelling bricks that aren't 4 straight bricks or 4 bricks as a square. It was working, all blocks were perfectly placed, yet it swayed at 300 and collapsed. Realism? pfffff
Terrible..... Tetris with terrible physics.
It would be logical if you could, say, build a wall on both sides using straight up blocks, but they got knocked down just with a tap!