The "tap here" bar should be closer to the sides (two bars - left & right) for easier thumb access. As it is now it just makes us block the screen with our hands, and the only way to reach it is by twisting our wrists to the point of carpal tunnel syndrome!
Instead of the useless bag with $ symbol in the center of the screen you should put all the useful game elements into the prime location - the "p.o.k.e.r." chips, bit coins and the pop up messages! Those elements are currently lost at the edges of the screen.
Otherwise its fun just like ppl say.
iTuneStar10 about Gold Coin Pusher Pro