XNA Randy walking on a slope

Inspired from Kersson's article about How to move a sprite in a continuous map, I thought it might be cool if :

1. The terrain also moves around and not only Randy.
2. There would be a nice background,
3. and maybe it starts raining.
4. If Randy starts jumping around, this would make it close for beeing perfect.

Have look at the outcome so far below (sorry, might take a while to load):

Stay tuned as Randy should do some more things soon!