The game has really good potential. I think it needs a few fixes and it’ll be great. One thing is that standing on a crate doesn’t really stop time (for me).
Another is that in this level:
When I push the crate to the right it sometimes goes further right and drops, other times it goes right and stops and sometimes it doesn’t keep going right. It is unpredictable.
Overall, it was really good. I did skip one of the puzzles.
In this level:
I just floated right without using the two crates as intended. :) It is possible as I intuitively suspected.
I would slow down the game a bit or the falling of inanimate objects. It was hard to land on them. If they would please fall slower than the player, it would be more fun. :)
Good work!