The concept behind SeventhSky is simple: choose from 1 of 4 mecha, then fly around and blow stuff up. There're only three types of enemies and one background track, but it's a pleasant light beat overlaid with strings and voice. The graphics are decent and there're lots of features. Transformable mecha, secondary weapons, a (crude) radar, multiple play modes and customisable controls. Ambitious amateur Flash game. Just turn the volume down so your boss doesn't catch you.