If no one is playing, try asking someone else to do a 1v1. Who knows, maybe more people will show up. And if that doesn't work, play offline for a little bit and then check. Instructions in game, but for quick reference: WASD/Arrow Keys to move Mouse to aim Click to shoot E to swim Q for special X for Map C for emote list, C for emote after hovering over it
A lot of people contributed. Look in the "Credits" part of the game. A few big ones are FunnyAnimatorJimTV, Nintendo, and the Splatoon franchise. Also, thanks @platypus3333 for the original game.
