This is a very cool concept! And the fact that you can naturally discover the mechanics by just knowing Youtubeās UI is pretty sick.
The platformer gameplay is a little lacking. I donāt really like how floaty the jump is and that you canāt fall through platforms if you press [S] mid-jump. (Hey, thereās this gmtk guy who has a really good video on platformer controls :)
And itās my personal feeling, but I thing the game would be more engaging if you controlled the UI by mouse like you regularly do. Right now it takes a lot of time just walking from one side of the screen to the next. And when you just opened the game, itās hard understand that you need to go to the play button to press it, and not just press [E].
Itās also a little annoying that UI resets on level change, because you probably always want āloopā on. And it would be better if captions showed where they are going to appear because right now you just have to guess the timing.
All in all, itās a really creative entry!