A lot of content. Different characters with different enemies, a big level to traverse through. No enemies though. Would be nice if you added enemies before the boss. Soundtracks were really good.
The main problem this game has would be the camera control. I had a hard time navagating the world because it was hard to: aim skillshots, jump on platforms, face the boss (omg half of the boss fight was spent trying to get the camera to look at the boss and to get the character in position to aim skillshots at the boss). You should lock the cursor and hide it too. I could not do a full 360 camera turn.