On desktop use mouse to select dice/tanks and use the ARROW KEYS or WASD to move/aim and SPACEBAR to confirm/fire. On mobile, tap to slect dice/tanks and use the on screen controls. Rolling a '404' is the best roll in the game, as it allows you to set Fuel and Shield to Max and Inaccuracy to zero.
Roll Tanks is a js13k entry from David Durham. Roll Tanks is a team based tank battle game with dice rolls. Each turn you roll the dice, choose a tank and set it's stats then roll into battle.