I see you trying, but I don't really think this went out too great.
Let's talk gameplay first. I think this is probably the strongest part of the game. move your mouse to hit the red bars sliding down the strings. Cute, easy, simple. In terms of what I'll guess you're going for, this is an acceptable kind of simple gameplay. Maybe a little repetitive, but none-the-less fun for a little bit.
Alright, now the sound quality is also good. But how you presented it is why this game isn't good or very enjoyable. I dislike how my mouse activates each string as I move across. If there was no game to this and it was just a guitar string sim or whatever, that'd be fine. But when it's mixed with gameplay, it makes a mess of sound just to get to the red bar which plays another sound and it just ends up this mushy sound wall that isn't pleasant at all.
So, here's a couple thoughts that could possibly move things better. Possibly change the strings to different pitches that would create a chord, so as you're moving along, instead of making a jarbled whatever, you're actually making some kind of music as you move along? Maybe with each red block you get, the chord changes, and boom. Now you have gameplay with nice sound that the player gets to make and feel a part of.
I think I see what you're trying to do, but the execution wasn't there. Though that said, this shouldn't be a scrapped idea. I think this could be something really fun with a bit more thought.