In Generate Rex Nanite Master, you play as a guy called Rex. He can create weapons from his body as long as he has the build to work with. To play you will use the directional buttons to move you around. To attack you will press the space bar but keep in mind if you don't have a weapon you can't attack. If you see any blue lights that are surrounding a weapon quickly get to them to collect the weapon. From there you will be able to actually attack with that weapon whenever you press the space bar. Your enemy is a monster called Biowulf and its up to you to keep him busy, so why not see how long you can last against him.