press green flag and wasd or arrow keys to move, zero to enable editor, and play mode 1-9 to choose what block you want to build. and this is just a little bit of the course I made. and for the level saving system just these keys .sorry if I havent been online this summer been busy. L to load level 9 (EDITOR) to spawn goombas for less lag :https://turbowarp.org/494294828
@griffpatch for the tutorial :D Try remixing and make your own level (I will have a contest of what level is the funniest with level editor). Got 1000+ views: 0 :o :0 this is how levels should be like https://scratch.mit.edu/projects/502589788