Armadillo Gold Rush ($3) — This cute new arcade puzzler puts you in the leathery skin of an armadillo that has to roll around the Old West collecting gold and avoiding obstacles. The catch is that the little guy must always make each move in a straight line, traveling the full distance until stopped by an obstacle in his path. Over 75 unique levels ramp up the challenges, requiring your armadillo to avoid snakes, scorpions, spikes, and other dangers…