This was such a nice take of the theme! The puzzles are super well thought out! It encourages experimentation with what sequence of characters you should go with at the start of the level, and thats really neat! The difficulty curve was paced greatly as well. The simplistic art style was a good fit with what you were going for (makes it easier to process everything on screen at once, which is essential, imo, in a puzzle game). Just good execution over all! Great job, this was really fun!