Great idea for a mechanic! The presentation made the game very tense, and I feel like things were well tutorialized, like the toxic fumes if you don't break the boxes in level 2 or having to figure out how to pull some of the boxes in the last level. With more time (game jam, I get it) maybe an even better intro could demonstrate the controls in a safe environment first, before throwing you "into the fire". Overall great concept!