There are a variety of enemies, and palette swaps of each one, all of which have different rhythms to their attacks; it almost plays like a rhythm game. (derek-lieu.com)
But this is more than just palette swaps and outfit changes, you get new stories and twists on the main plot that really mix everything up. (thekoalition.com)
There is quite a bit of palette swapping for many of the enemies and this can prove to be boring at times if you aren't caught up in the action or story. (iamericm.com)