Bloody Christmas

ASDW ? Move

Arrow Keys ? Shoot

Z ? Skip, move on, retry etc.

P ? Toggle sound

1, 2, 3 keys ? Set quality to low, medium or high respectively

You can also shoot with the UIOHKBNM keys if you want diagonal shots to have their own buttons. More for if you want to stick a controller in and assign diagonals to the shoulder buttons or something.