Use the arrow keys or wasd to play. Don't touch lava or spikes. Jump into the portal to get to the next level. First one: https://scratch.mit.edu/projects/499052781/ You can also go to https://scratch.mit.edu/projects/497092396/ for the same project.
If you are stuck in a wall, double click the green flag to start again. Some of the code for this came from a tutorial. I don't remember who made it though, and if it is you, tell me and I will give you credit. Thanks to @pianoLego for making the contest!