hmm give me a while, i'll try to give hints. thanks for playing my game!
both are tough levels! i give puzzlescript+ solver credit for verifying that 3-5 was solvable. (and i'm starting to feel that 3-4 should be shifted down to 3-2)
edit: for 3-3 it's mostly sokoban. don't be afraid to move boxes as long as you don't get yourself trapped. the hard part is just getting the orange box out without screwing yourself, after that it should be easier.
3-5: haha yeah this one is tough as heck, basically 1-5 on steroids. also a rather sokoban-like level. just try to make use of the double push. once you recognise the common traps it shouldn't be too hard.
i may add a new set of puzzle related to possession and multiple players. can't really design any interesting puzzles though