Surviving the first round | 13: Devil's Dalliance DMC: Devil May Cry Guide
Last update: 11 May 2016
A typical feature of the battle which stands for the first round is a fact that from time to time, the tiles on the ground activates. Do as previously. When you see red tiles (1st screen), activates demon mode, when you see blue tiles (2nd screen) use angel mode.
A good idea is to fight in the air so you don't have to control tiles' color all the time, but it isn't necessarily. You have to eliminate all monsters.