The keyboard controls are the following and are listed in-game under controls:
Left Arrow – Right Arrow (Up Arrow swaps in co-op)
or
Comma – Period (L swaps in co-op)
or
Q – E (W swaps in co-op)
or
Spacebar – Right Shift (Right CTRL swaps in co-op)
– or + (on the number pad) will lower or increase your manual speed.
or
– or = (next to the backspace) will lower or increase your manual speed.
Written by Silver Dollar Games