This is impressively polished, well done! Cute designs and great tunes! I love the different play styles for the different instruments, and the retry button is a great touch for the times when I messed up early (the retry sound got grating for me after using that button a lot though!) Also, I'd be curious to know if others found the first two notes of the second guitar on the first level weirdly hard. I spent a lot of time stuck there, then breezed past the rest of the level. Pretty minor issue for a game made in 48 hours. Absolutely incredible work for a solo project!