The game was unfortunately just a tutorial so it feels difficult to judge. It did seem like there were too many mechanics to teach and too little time. For future games, perhaps focusing on one small mechanic that can be scaled upon would be better. Would also be nicer if new mechanics are taught as they are introduced as a part of the puzzle so it doesn't feel like I'm being told what to do, but figuring out the mechanic is a part of the puzzle too.
I did also notice that the player still moves when the editor is open, so if you type movement keys or use the arrow keys to navigate the editor, the player would move too.