This game uses graphics from SuperTux
Which is nice, but SuperTux is GPL'd, these graphics are too and while GPL forbids to link GPL'd materials against closed materials, you need to release sources of this flash (.fla/flash develop or other).
Author Comments
Small animation featuring tux, maybe I will made a platformer some time in the future.
I really don't know if the art of the supertux games forces me to release the source, in any case drop me a message (if you want to enforce copyleft (: ). fst upload
