You do not have to play every level. Select "Time Trial Short 1" and choose "A" on visuals and complete the level. Then, reselect the level and select "Default score" instead of "Personal best" so you have one minute, instead of basing the timer on your best time. Then, select "B" on visuals and complete the level. Repeat the process, selecting the next visual and your default score. The last visual is "H".