Sadly you gotta restart the game everytime you lose as well, the game is pretty fun though and I like the mechanics
The only thing I would change, apart from fixing the collision bug, is the level design- took me a while to figure out that I can just grab/hide away from the first guard on level 4, seeing that I used the blocking method mainly on the third level. These mechanics would be great when explained separately.
Also a map preview before the level starts would have saved me so many restarts, but I understand there wasn't much time to add that feature. Well done game nonetheless