*lol* Yes, you are allowed to learn from the source
To be honest, there is not much you can learn for the raycaster engine from Running Man because they work different.
I made a spritesheet for Running Man while the raycaster engine sprites work with a complete texture (and not only a part of it). So you need to store each animation frame in a seperate Texture2D and cycle through them... its a bit different than using a spritesheet.
If you need help, just ask.