Tunnelward

One of Karel's quietest piano takes carries you down a receding tunnel toward an emerging warm light. A true 3D volumetric raymarch flies the camera down a funnel of warm participating media; his music drives the descent — louder swells quicken the travel and thicken the fog, quiet passages let the light grow and the walls open. Reach your hands toward the screen to accelerate and brighten, open your palms to bloom the light, and steer toward it; or use the pointer and arrow keys. Left alone, it drifts toward the light on its own.

Fully playable with the pointer and arrow keys alone. Allow the camera to steer and accelerate with your hands instead — hand landmarks only, seated is fine.