Boooooooo..........
The pace of the game is so fast, I always had a mole to whack...but whacking mole after mole after mole in level after level got very tedious. I am not exactly sure what the way around this would be...but it is what it is. The power-ups and golden moles and such didn't really help a whole lot.
For a much better (repetitive, but not nearly as boring) touch game try Point Blank DS.