In RumDreams, you control a little green blob of goo navigating a perilous 2D platform world filled with sharp spikes, moving spiky walls, and strange floating eyes that fire projectiles. Your goal is to collect three glowing energy balls scattered throughout each stage while dodging these hazards. Gameplay requires precise jumping, impeccable timing, and strategic moves to avoid instant death from dangerous obstacles. Each stage increases in difficulty, challenging your reflexes and puzzle-solving skills as you help the goo escape this strange and hostile world.