Could you release it to iOS as well? Making a game but I'm not such a good pixel artist.. You're tool is perfect! Good job :
I know it is frustrating to have only a windows build, but my goal is to do a good and stable tool first, and builds for others OS after.
So this is not my priority...
But OneMuppet try to do it works on mac ( /t/27695/bugs-report ), so stay tuned, maybe it will be possible soon...