Really interesting concept! I love puzzle games and this was right up my alley.
The final puzzle was cool but kinda just lead you to the answer through simple trial and error. The rest of the game was more challenging and fun and I think if you find the right balance between those two styles of puzzles, you'll definitely have something great on your hands, especially if you can figure out how to turn this into a mobile game.
Other than the lack of audio, I'd say this is a really solid game. Good job!