Hmmm!
It's very good. Howeeeever.. Even if style is good and gameplay is good and idea is good, I woudln't give you 5/10 because even insane difficulty is so easy and no changes in the forms/no powerups/no anything makes it a bit repetitive.
But I'm giving you max score. Coz the song rolx. You really should thanks the song author.
Good job tho.