Arrow keys to move. You can climb up platforms. Avoid red stuff. You can swim in water.
Note: To make the ground, you have to make a small layer of blue above the black for ground. I made this project so that you could remix, draw new backdrops, draw new sprites, and stuff, but you don't have to program anything. Please comment if you want me to add moving platform detection. Also, credit to those whose projects I looked at for help, which is pretty much everybody who has a platforming engine. This is a mix of all those(though not a remix, it just uses some of their ideas).