Brilliant idea and it's a great game for all the perfectionists out there (although enjoyment may depend on whether you really like arranging things). Somehow I found the game easier to play in full screen mode, even though the frame is the same size. The sliders are really accurate, usually the right position is just a pixel away, so either a bigger screen or setting your mouse slower could make the game easier.
I'd like to invite your game to our contest, the Game Development World Championship, I think this could do very well in the jam games category at least.