Although it doesn't take much to explain Prope's minimalist Let's Tap, Sega sent out this promotional video demonstrating its gameplay. This clip highlights the Rhythm Tapping, Tap Runner, and Visualizer modes, offering brief glimpses of other modes, including what appears to be a tapping-based shmup.
The overall message, delivered by a family playing together, is that it's quite possible for people of pretty much any age to enjoy Let's Tap together, which is, of course, the goal of many Wii games. Few other Wii games manage such a cool and futuristic look, or such a genuinely unique and interesting input method.
Apparently the family in the video enjoys Let's Tap so much that they purchased two copies, because the game only comes with two of those fancy boxes!