This is a very cool project, and very hard :). I really enjoyed it and hope you keep going. I'd love to see more of this(Although I still have some levels to beat!)
I did run into a bug(?) wherein hitting the Escape Key twice(playing on Keyboard) knocked me into what I think was the Picotron editor, where I could view what looked like source code. I couldn't find a way back into the game after this. I genuinely can't tell if this is a bug or an intentional hidden aspect of the game ah-la Doki-Doki Literature Club.