Welcome to iPhone Gems. This week, we look at four recent App Store releases spanning several different genres: strategy, puzzle, cards, and sports. Each of the titles is inexpensive, with a single $3 game—augmented by additional $3 In-App Purchasing levels—sitting at the top of the pricing pile. The standout title of the week is Geo-Defense Swarm by Critical Thought Games, a strategy game with impressively implemented vector graphics;…
