i slid off the edge of a platform without having pressed any directional buttons. also i'd prefer if the gravity were set a little bit higher. otherwise this seems pretty fun so far. IMO the level should auto-restart after death, but that's not really a big deal. I noticed i didnt actually need boxes to cross the smaller lava pits, and it seemed like i was supposed to need them in a few puzzles where they didnt end up being necessary.
i think you have some issues with the edges of your platforms in general, as well as with walking on slanted objects. i keep falling off of things because it seems like the jump wont work while im sliding, meaning that if i try to jump off of something and maximize my distance as would normally be the best thing to do in most platformers, i dont even jump and instead i end up falling.
im not sure how the score is supposed to be working here. i get negative points nearly every time despite winning with 1 death or less consistently. im not really playing for a high score so that's fine, but it seems a little weird.
maybe consider adding a few more tokens to grab? a lot of games that use this kind of design have a 3 star rating system for each level and collecting all 3 tokens or w/e gives easter eggs.
some objects (especially the largest size of boxes and the wooden boards) routinely took more than one shot to grab. it just didnt seem to want to pick them up a lot of the time.
i definitely found a few shortcuts so far. i'm assuming they were meant to be there, but im not sure, so i figured i'd mention it. a lot of the time i didnt even have to solve the puzzle cus i could jump thru the floor somewhere or stack boxes until i could surpass w/e obstacle was supposed to be there
i got the gem a few times but was killed by the shooter pod thingies before the level ended - this didnt happen in the one level where you were forced to run away from one down a dead end hallway to get the gem fortunately, but it happened in lvl 15 because i jumped as i picked the gem up.
game froze on level 16 and i was unable to restart or use my gun, but could walk and jump normally.
when i set boxes on buttons they often got stuck and couldnt be picked up again.
i really feel like i should be able to jump while on top of the wheel. it took me a while to even realize that it wasnt just the game glitching out lol ... the wheel also pretty frequently fell off of the level without me even touching it. its good that it rolls around a lot, but it definitely shouldnt fall by itself.
holy frick level 20 was hard.
fun game - took me a little longer than expected. i'd like to see some more complex puzzles in the future, but i liked it as is, too. keep up the good work