I honestly can't think of a reason for why it is rated 2.27/5. This game is great, and I would love to see in the App Store (I don't know how to add it there). It looks great, it's original, it has cool effects... You can make incredible things in Unity! The only thing I can suggest is to add more levels.
PS: "complate" is actually spelled "complete" :-)

I thought it was great with the piano sounds and all that stuff, but I feel like there was no real beatdrop, you know.