Here is the full list of all 14 Blink the Bulb achievements.
Defeat the boss of Egg Land Stage 1 during the night
Defeat the boss of Terra Land Stage 1 during the night
Defeat the boss of Fright Land Stage 1 during the day
Defeat the boss of Love Land Stage 1 during the night
Defeat the boss of Winter Land Stage 1 during the night
Defeat the boss of Soirée Land
Defeat the boss of Egg Land Stage 1 during the day
Defeat the boss of Fright Land Stage 1 during the night
Defeat the boss of Terra Land Stage 1 during the day
Collect 10 keys
Defeat the boss of Love Land Stage 1 during the day
Collect 500 imagination sparks
Open 10 chests
Defeat the boss of Winter Land Stage 1 during the day