Hi!
We are currently making a game, where you play as a freelance musician and should accomplish simple music related tasks during the story. It currently has 2 musical levels and some story between. The main feature is a support of virtual instruments that works in realtime, so you are able to immediately hear the changes you have made.
Please, consider trying it out and leaving a comment if you liked it or not, particularly the music levels itself. Maybe they was too hard/too easy for you? We would be really glad to receive any feedback! It is vital for us! (haha, get it? nevermind...)