Umbra Nine

An anti-gravity racing game on Span Nine of an unfinished orbital ring above the gas giant Kesh. Eight machines race five laps of a 3,240 m course. Heat and hull form the central resource system: sunlight raises heat, eclipse allows cooling, weapons also cost heat, and repairs require surrendering track position in an induction lane. The codebase was converted from Kart Royale and expanded with the same critic-driven Gauntlet Loop process.