Here is the full list of all 12 Lowglow achievements.
Complete 30 levels with less lines than the given amount. Magnificent!
Open all of the vaults in Umbralight
Complete 15 levels with less lines than the given amount.
Open your first vault.
Complete a level without missing a single drop.
Complete the fifth chapter
Complete the fourth chapter
Complete the third chapter
Destroy 50 lines.
Complete 5 levels with less lines than the given amount
Complete the second chapter.
Complete the first chapter.