The default controls are the arrow keys. R to reset the level. F to toggle the background. V to toggle lag/hitboxes. When playing, a slider appears when your mouse is on the top of the screen.
Made a new version https://scratch.mit.edu/projects/652087180/ All scripts were made by me. This took me a while to get this far. I was going to have an editor, but it lagged the game so much it just couldn't go any further. Another version that isn't as advanced but is close. https://scratch.mit.edu/projects/589546430/