[daphne]

This one is spyware.
Android Game Isn't Actually a Game - F-Secure Weblog : News from the Lab

A game called Tap Snake isn't just a game, it turns out to be a client for a commercial spying application called GPS SPY.

Still avaliable:
GPS Spy v1.0.5 Application for Android | Tools

Download and install the free Tap Snake game from the Market to the phone you want to spy on. Press MENU and register the Snake with the service.

Use the GPS Spy app on your phone with the same email/code to track the location of the other phone.

Shows the last 24 hour trace in 15 min increments; data is kept for a week.