Due to the high difficulty of Warehouse, it will stay OSX exclusive. Only a few testers have had the ability to finish most of the puzzles. For the iOS user base, the game is just too hard and my interest is in making challenging games for players who are ready for that level of difficulty.
The follow-on title has a much lower level of difficulty for a broader user base.
This isn't to say OSX gamers are more capable of difficult puzzles, it's just that the game has already been released for OSX and the genie is out of the bottle. Finding a market on the PC would be nice, but the game is hard to market since it sells itself on challenge instead of nice graphics over shallow gameplay and a short game experience.