Llamasoft's Jeff Minter has launched Super Ox Wars, an iOS tribute to Tecmo's classic arcade shoot-'em-up Star Force.

Though Super Ox Wars resembles an early-'80s shooter in terms of presentation, its gameplay is surprisingly complex. The game features a polarity system that awards the player bonuses and power-ups throughout each level, depending on how many items of a particular color are collected.

A full explanation of Super Ox Wars' nuanced gameplay (including its origins in Amazonian tribal folklore!) can be found here, if you're interested. If that all sounds a bit too complicated, Minter advises: "stick with one colour for a while, and score/firepower/protection blessings will accrue to you."

Super Ox Wars is priced at $1.99.