The river is narrow, your boat is tiny, and every pirate on the water wants it gone. Slip between lanes to dodge rocks and kraken tentacles, and keep an eye on the enemy ships: some shoot, some cut across your path. Fire back when you can. Sunk pirates drop coins and pieces of an old map, and coins buy you a faster, meaner ship.
PC: Left/Right arrows or A/D to change lanes, Space to fire, P to pause.
Mobile: tap the left or right side of the screen (or swipe) to change lanes, tap Fire to shoot.