I like the scale too, could you overlay it on a tile that is like an embossed calculator or a representation. Not blatant, sort of a subtle difference in shade, just enough to notice subconsciously and maybe make it out if you look for it. Sort of like when you see black decals on a black car. I'm not a designer, and have no image editing skills so I hope you get what I'm saying. Enough to convey the points calculation aspect of the app. edit: type slow and get interupted. I like the one you just posted.