In Rocket Gravity, players control a rocket, maneuvering between dangerous cliffs while collecting coins and stars to complete each level. The goal is to gather all three stars and coins, avoiding collisions with obstacles. The game features moving platforms, exploding mushrooms, and falling icicles that can damage the rocket. With in-game currency, players can purchase new rockets that differ only in appearance. Players can use a shield to temporarily protect the rocket from collisions. If the rocket crashes into an obstacle, the level must be restarted.