Wack a mole type games have long gone out of style here. At theme parks, mini golf places etc there used to be many hands on versions of them,. Now everyone just want's to shoot stuff. Reason why even in video games, the wack a mole ordeal is pretty much 2 generations out of date.

My suggestion, is make it so you have to shoot the critters etc with a gun (or, less violent, with say a lazer gun/beam). Just my idea though. I'm sure others will chime in. It looks like you have done a pretty good job.

If you want to stick with the wack em game, without shooting etc, you could always make different artwork. Like wack it, Jersey Shore style, or Real Wrold wack it,.