Rating issues
Characters that are hit by snowball or power ups (which include missiles and grenades) flinch a bit, or are knocked back, depending on the type and power of the attack. When your hit points run out, you’re defeated, fall to the floor and a small skull arises where you died. After a few seconds you reappear on the battlefield.
Other issues
When scoring multiple kills in a row a dark voice narrates “Double kill”, Multi kill” like in popular first person shooter games. This doesn’t influence the violence seen, but the voice-over does refer to killing.