Awesome game dude!
Showed me how bad at typing I really am :(
*Edit*
I feel I should add a bit more to this as I was a bit rushed when I left the comment.
The animations are excellent. Felt very smooth and polished.
I loved the way that the missed words are sung out of tune it really adds to the enjoyment when you are on a flow and nailing the song.
The upgrades all fit really well, none are a "must have" so you feel like you can attempt to plug holes in areas you are struggling / excelling.
Music was excellent as always.
Awesome job