Its an interesting design choice for sure! Guess it depends whether you want the puzzle to be between the player and keyboard or the player and the screen/level (both are valid!) There are other games that have similar player to keyboard puzzles that work well too! It definitely fits the theme of your game and when I shared it with my partner the reason clicked for them immediately!
The multi-connections make for a really fun time experimenting, although by adding in the more linear paths later it makes the game feel almost too easy for that stage lol, but its such a cool concept I truly hope you stick with it and produce a longer game, it's one I'd love to support!