Beautiful music, concept's original, and the gameplay fun. It is annoying, however, that we have to replay the levels that we've already gone through in Adventure Mode. 4/5, otherwise brilliant.
While the level designs are original, and the level progression mechanic innovative, the game feels a little bland overall. It doesn't give the same action-packed feel that N has, and lacks the smooth fluidity that is present in other platformers. Unfortunate.