Press A, S, D, F, G, H, J, K to play. A is C, S is D, D is E, F is F, G is G, H is A, J is B, and K is C2. I know it sounds complicated, but it's really easy. If you know piano, you'll understand what I'm saying. Press Space to tune.
I love piano, so I thought of an idea where you can play an electric guitar on scratch. If you have a QWERTY keyboard, use the 2nd row of . letters.