Here is the full list of all 11 Tamiku achievements worth 1,000 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements on Xbox One.
Complete the MONSTERS' CAVE stage.
Complete the DEVILAND PARK stage.
Complete the THIEF'S MINE stage.
Complete the BOMB FIELD stage.
Complete a BONUS LEVEL.
Complete the WHITE LAND stage.
Complete the UNDERGROUND GARDEN stage.
Complete the LIMBO MAZE stage.
Complete the BARREL FACTORY stage.
Explode a red balloon.
Explode a blue balloon.