Very nice! Although I think I may have found a bug where one of the slimes flies off into the stratosphere on the second level when you walk to the left and then the door won't open xD
Viewing post in Game submitted, please playtest!
So as far as I can tell once I got to the second level, I would go towards the left side and I saw one of the slimes kind of launch upwards from the left and I when I got the rest of the slimes, the next door didn't open. (I assume that's because the slime that flew off was still alive off screen maybe?) Hopefully that helps! :)