Love the percussion at the start of Enemy Showdown, really sets the right mood for the track. Something I feel you did really well, are these slower evolving melodies, and the consistent tempo and feel throughout the tracks. That makes them ideal for background music in a game, where they won't get too repetitive, but neither will they become boring, as it'll take a while for the brain to memorize the melodies, but they're still there to add interest to the composition.