I really like the idea of using this game as a fun way to teach ear training, i.e. relative pitch. My only feedback is as follows. 1. its really nice to have the loop replay instantly when the first note is wrong because it forces the player to hear the interval at which the first two notes are off, however when on the other notes there should be some sort of beep (or something of that sort) to give the player a little break before the melody plays again. 2. If you ever go any farther with the game you should have a different section for major and minor. The game right now functions great as an ear training game in A minor, but with small amounts of tweaking you could also have a C major (same notes just change the starting pitch) version. In parallel if you don't want key to matter instead of a, b, etc. you could use solfege syllables, i.e. do, re, mi, etc. to work on relative pitch instead of perfect pitch in a specific key. overall, I loved the concept and gameplay of the game and as a fellow musician I think that a game like this would be incredibly useful to work on ear training.