Most monsters you can kill will leave either gold coins, hit points, or power-ups. You use gold coins to buy more power-ups in shops that are spread across the levels, and you can save the game at "save points," similar to console games. The game is much longer than your average freeware platformer - I have seen 5 levels so far, and there is no sign of an ending. Although it starts out very slowly, with few monsters to fight and sparse landscape, Grounstream gets better and better as you discover new skills, meet friends who will help you fight, and explore more fantastical terrains. Anyone who enjoys Akuji will likely enjoy this underdog too - although don't expect the game to be as polished, and give it some time to impress you. Two thumbs up!