Grounstream is a freeware Japanese RPG, where the player controls the cat-like heroine, a novice sorcerer completing her training by traveling and collecting basic magical elements from the world. The game is presented as a side-scrolling platformer, with the protagonist jumping on ledges and shooting incoming enemies with her repertoire of spells, receiving experience points after destroying each foe.
After being killed, the monsters drop coins that can be collected and used on shops to buy power-ups and health potions. Tombstones appear sporadically throughout the levels, acting as save points to record all the progress done so far. Keeping with overall arcade theme, each section ends with a boss battle against some large creature that takes most of the screen state.