These are the first three levels of Platformer V. 3.0, an upcoming game I'm going to be releasing. It saves the level that you're on when you leave the project (but only if you press the stop button.) Official version of Platformer V. 3.0 will be located at https://scratch.mit.edu/projects/125740454/
I know, I know, sometimes your avatar floats if you complete a level, but to be honest, I can't figure out what's going on. Any suggestions?