Falling Sun

Go down to the depths of the freezing village. The deeper you go, the colder it gets. Hide from enemies, use sunbeams to solve puzzles and find your own home.

Lenses are you healthbar. If you will run out of lenses, you'll die. 

WASD — move
Spacebar — jump
Double spacebar to climb
E — pick up (lenses or beams)
CTRL — sit
Shift — run