A and D to move left and right respectively.
Normally the scroll wheel to navigate the inventory bar however that's broken on web, 1 moves the inventory left and 2 Moves the inventory to the right.
Left Shift is used to slow walk. Right mouse button is used to run.
Left mouse button is to use the item highlighted in inventory. ie. sword, flashlight
E is to pick up items however items currently don't have functionality.