The flag
Someone left the summit flag at the top of the mountain, and it belongs at base camp. Go up and bring it home.
Drag anywhere to walk, like a joystick. On a keyboard, use the arrows.
Walk into anything to pick it up. You can carry one thing at a time; tap (or press Space) to put it down.
Two gates on the ridge are locked. Carry the gold key to the gold gate and the blue key to the blue gate.
A yeti lives on the mountain, and it follows you from room to room. Carry the ice axe and it can’t touch you. On harder trips, watch for the bear, and the raven that steals whatever you’re holding.
Base camp is safe. The faster you get the flag there, the bigger the bonus. You have three lives.
Nine rooms. One flag. Bring it home.