Ok then.
All my submissions with transparencies ( Just noticed that I accidentally missed the tree on my last post).

http://s6.postimg.org/b4orbmkk1/Nature_Robot.png (Unsupported image host)
http://s6.postimg.org/67b6qiikx/GUNFINISH.png (Unsupported image host)
http://s6.postimg.org/e1bsbwqdt/Tree_Hat_Finished.png (Unsupported image host)
http://s6.postimg.org/93y7qsoel/BIRDWIP.png (Unsupported image host)
http://s6.postimg.org/x8yx8i8pd/treetrunkhat.png (Unsupported image host)

*In the robot pet, there where some idividual white pixels that I couldn't use transparencies with so I used 000's black.