A one-thumb arcade game with a sharp core loop

LUMEN is a one-thumb orbit arcade set in bioluminescent deep water: tap anywhere to reverse your orbit and slip a glowing lumen through the opening of each closing current-ring. Chain perfect dead-centre passes and drifting motes to climb an x8 multiplier as the current tightens, with an automatic UI-free attract demo and best score saved locally or to the cloud.