It's a fun game, but I can't figure out how to get through stage 5. When I use the the water to jump it just throws me into the lave block directly above.
Based on what I'm seeing it looks like the green character is jumping much higher than he's intended to. I'm just guessing, but it might have something to do with the game running at a lower framerate on my computer (my machine isn't the best). Since this is Gamemaker, are you multiplying movement by "delta_time"? That might be the problem, but I'm not sure.