I definitely like the challenge of this version compared to the original one you released (if I am correct, none of the balloons were moving in the first version). With the difficulty and mechanics of the game, you could definitely turn this into a money making game app. Perhaps you could add in some new challenges like balloons moving up, going off the top of the screen and reappearing at the bottom to begin the cycle again. The only other suggestion is that I like the PG version, but it would be cool if the pictures were more unique and interested, like maybe famous art pieces or something. Very good job on the game!