English
posted by John .
Roll the dice. If you get 3 on the face of the dice, move forward for 3 spaces.
Roll the dice. If you have 3 on the face of the dice, move forward for 3 spaces.
Roll the dice. If you get Number 3 on the face of the dice, move forward for 3 spaces.
Roll the dice. If you get Number 3 on the face of the dice, move forward for 3 spaces.
Roll the dice. If you see 3 on the face of the dice, move forward for 3 spaces.
(Which expression do I have to use? Would you check the expressions above? I'd like you to give me better expressions which can be used in the dice game.Thank you.)

Your statements or directions are all unclear about whether you are rolling one or two dice. Are you looking for a total of three on two dice or a "3" on one of the dice? The singular form of "dice" is "die", in case you are throwing only one.
Two dice will have two faces up, but you say "the face of the dice", mixing singular and plural in a confusing way.
If you are throwing one only die, it would be better to say:
Roll a die. If you get 3 on the face of the die, move forward for 3 spaces.