Yinako, please offer these with a transparent background! I started using these in a game I'm working on and I really like the art style; I actually want to buy the full set from your wesbite. But it is such a pain to manually hand-edit the black background out of the files, and I don't have the skills to do it very well so there are still tiny black pixelated areas in each image. I'm having a lot of trouble with the yellow gem, I don't think I'm going to be able to make it useable at all.  So I wish on your website you would sell these with a transparent background. Is that possible?

Two other things I would love to see from you: 1) I want these in a bigger size! Did you create them at this size, or do you have a higher resolution set somewhere? I'd love to purchase them at a higher size so I can use the retina functionality in my iPhone app. 

2) Can you make a old-fashioned dungeon-crawler type silver key in this style? I really need a key in my game, and I want to stick with your art style but unfortunately no key is in this set!

Please let me know; I love this set and would love to hear back from you!