Holey Moley is a simple to play, fast-paced game where you smack moles about with hammers, pretty simple stuff, 3 modes of play including: Quick Play Hit as many moles as you can in 60 seconds Survival Survive the Moley Onslaught and defend yourself with power-ups! No-Miss You miss a hit, you die, simple as that! Each play mode has 3 different difficulty settings which ramp up as the player progresses to keep the game challenging at all levels. But wait, we added a 2 player mode also! Yes, with the magic of a Standard controller (bluetooth or otherwise) you can pit your skills and reactions against another player and use battle items to thwart your opponent whilst boosting your own score! This works across each play mode and really adds to the tension. 2 players can share the same controller for true head to head gaming or use seperate controllers instead.
The linux version of Holey Moley, again, completely free, if you can run unity authored games on your flavour of linux it should run, although compatability is not guaranteed with everything :)