I was getting stuck at the second person's box but I'll give the benefit of the doubt as I didn't see anyone lese having the problem. Cool game, maybe add more levels?
I really thought this is a game where all the artwork was very good until I saw the blobs! Very fun concept, if I were you I would've added WASD controls too.
Great first game trying out Gamemaker. When I tried it, I made a tutorial game with honestly not good graphics. That too took about a month. You made a better game in a week!
It is supposed to be a hard hame. I'll tell you how to get off of the platforms. First, jump towarda the closest billboard and hang in there via W. Then, use space to slowly climb back up.