Pyglet is dead. Long live retrogamelib!
TIL the hard way that pyglet isn't the best choice for pixelart games. Now i have rewritten everything to use retrogamelib, which is based on pygame. It is much more easier if you don't have to fight with buggy scaling. Also i get a retro looking menu for free!As i can't use pyglets animation anymore, i am know using pyganim. It was easy plug and play, although i can't use spritesheets anymore. I found nothing promising for handling spritesheets in a quick websearch, and i'm too lazy to write it myself ;)
If you are interested you can checkout my darcs repository at http://darcsden.com/lennart/retroMars.