Naturally, it's dark underground.
The area he's in right now is the same area I showed a while back with the polkadot dirt, in the digging update. Also, there's not really a low ceiling there, but OO is crawling anyway.
When you're ducking, hold left or right and you'll go prone and start to crawl.
Oh, also, I'm working on the design for the HUD.
I changed where the game starts, it's not underground right away.
The basic idea is the blue one lights up when the ground under you is soft enough to be used, and the green one just shows you what can go on if you examine, like look or open and stuff. I dunno about it though, I might abandon the green one and go for a thought bubble above OO for different situations. What do you think?