The little question mark tells how to use this program, but here it is again: Arrow keys to pan (move camera around) Clicking and dragging will create a platform. Pressing F will put the player (the blue rectangle) to your mouse the next time you click. Pressing Z will delete the last placed platform. (Repeatable) Pressing O will stop your editing and give you the code to enter on other projects. Pressing I will allow you to enter a code to edit an already made level.
Go to the link below to play it: https://scratch.mit.edu/projects/180985960/ I made it