Glad you were able to fix your issue!
At first I wasn't exactly sure what to do, but the idea is pretty intuitive so I figured it out pretty fast.
I liked how destroying debris made you bigger and getting hit made you smaller, although I did have some issues with it, as I eventually became too big while standing under a block, so I got stuck and the debris couldn't reach me either.
It was nice to be able to hold off debris by blocking it behind walls.
I would've liked to have some sort of score/high score system so you can see how well you're doing compared to other playthroughs and other people. With a little more refinement like added scores, sound and some UI I think it could be pretty decent!
Good job :D