The arms and head have a lot of strong dynamic angles. The legs seem to have been left out of this design scheme. Same goes for the texture. The arms and head have one character, while the rest of the body is a guy in a wifebeater and jeans. For the lowerhalf, I suggest looking into the Megaman style of character design for enhancing your shapes.
For the fun of it, here's a picture of my Pie in the Sky disks: http://chrisholden.net/gcs95.jpg
Of course, back then it was less than DOOM (1) technology. All sprites and no textures allowed on floors/ceilings. You kids today, with your polygons, and your... HEY! Get off my lawn!