Deepcut

There's a gem at the bottom of the shaft, 800 metres down. Get to it. The clock is running.

You have a pickaxe and a headlamp that reaches about twelve metres, which is not far enough to see what you're dropping into. Ore upgrades you the second you touch it. No menus, no inventory, no shop. Every mineral makes you stronger. Every mineral is a detour that costs you time.

You'll work out the balance of quickly that digging and managing that most precious resource, hp. That's the whole game. How much of a drop are you willing to take to save ten seconds?

Things that will kill you

Shale that comes down on your head when you mine the block beneath it. Magma you can hear from across a chamber before you can see it. Gas pockets that vent on a three-second cycle and blind you when they catch you. Fulminite, which explodes three seconds after you hit it and takes half the wall with it. And the drop, always the drop.

The daily

Everyone gets the same world each day, so you're racing the same rock as everyone else. Run it as many times as you like; the streak counts days, not attempts. Splits appear every 100 metres once you've set a time to beat.

Or turn the clock off entirely and just go down.

Also in there

35 achievements. Depth, gems, sub-25, sub-20, sub-15, sub-10 and 10 pickaxe skins to earn. A soundtrack evolves with your depth as pressure mounts.

Rebindable keys, adjustable FOV, and a screen-shake slider if you need it.

WASD move · Space jump · LMB mine · RMB heavy break · Q charge · P pause

Hit fullscreen before you start, or mouse look won't work, browser sandbox thing, not much I can do about it.