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This is your scuba diving training. Your goal is to reach the next oxygen station and get as many coins as possible within the time limit to advance to the next round.
Use the UP, DOWN, LEFT, RIGHT arrows to navigate. Try to avoid the sqwabbles, they might steal your coins.
Pressing the SPACEBAR will deplete your oxygen, but this will boost your speed. Use this in case of emergency.
Don't fall or you'll get caught in a heavy under current.