Make me a mobile ultrakill game with good optimi

VELTRIK // MOBILE BLITZKRIEG — a thumb-first raycast blitz-shooter that runs entirely in the browser with zero downloaded assets. 8 distinct weapons (revolver, shotgun, nailgun, railcannon, rocket, plasma, grenade, coil lance) plus a melee parry-punch, 20 procedurally built arenas with escalating hell-layer themes, and 20 enemies including 6 named bosses with charge, teleport, summon, beam and phase mechanics. Adaptive internal resolution keeps the raycast renderer at 60fps on phones; progress, unlocks and settings persist locally.