You'll still be fighting enemies in small arenas, and jumping from place to place in linear fashion as you go through the game's seven stages. (glitchcat.com)
Multiplayer still involves you running round various small arenas, then whoever pulls the trigger first and keeps their shots on target, wins. (thegamefreakshow.com)
The map is broken up into several smaller arenas and in order to advance to the next section, all enemies and bosses in an arena must be destroyed. (darkstation.com)