Lovely little game!
It is really impressive how polished you got this in just 3 days, especially the sounds and music. I found one tiny bug though; in the level where there are the levers and moving platforms, pressing on those twice in quick succession leads to the platforms' animations bugging out. The characters' animations also sometimes glitched out - on some cases it looked like they were running and in other cases their legs were moving at snail speed.
But overall though, the gameplay here is quite interesting; puzzly, but not too much. The ending was also great, props for that! 👌