P1 move A and D slice space and W jump. P2 move arrows slice 0 (use num pad) and jump up arrow. If you keep attacking you get a combo, it happens in this order long slow slice; one damage, fast upward slice; two damage, stab; three damage. Letting go stops the combo.
song is Diggy Diggy hole by wind rose. I may change the fighting song eventually. Online version and Co-op version hopefully on their way.