When it finally clicks in Somnia exactly what you're meant to be doing, it's a moment of sheer wow-ness.

Teased in last week's Cryptic Sea trailer, Somnia is a 3D first-person perspective outing revolving around light and shadows. Each of the puzzles must be completed by flipping between the shadow and the 3D-world. Platforms which seem unreachable are quite easily accessed through 2D shadow platforms.

It's pretty tricky to describe the experience, so I'd recommend to just go and try it. For anyone who can't work out exactly what they're meant to be doing, try standing on a platform and clicking.