This 3d shooter works but has issues. The main character is cool but the animation has potential for improvements. The arena is basically a large room with a reactor. It would be more fun with corridors, stairs and obstacles like water (see Doom or Quake). The enemies are tiny, hard to hit, and not too scary. The shadow clipping is too short which makes shadaws appear and disappear when moving around. However, the biggest issue is the camera movement. When walking backward into a wall the scene is occluded by the wall which essentially makes the player blind.
Good start!