The story and idea were fun and original :) A little more momentum and a challenge to gameplay could be interesting. I would pay attention to a consistent art style to make the game look more polished. I liked a lot of pixel characters :)
Collecting tabs was good idea, but if you want it to be clearer to someone who doesn’t play quitar, some simpler symbol like a notes could work better. While playing i missed feedback on progress. There were good vibes in the game ^^!