Here is the full list of all 11 TWWWR achievements.
Collect all of the trinkets
beat the game in under 35 minutes
Beat the game without killing any common enemies
Heal the tower
Beat the extra ending on expert
Finish the game on any difficulty
Beat the game on expert
Finish the Lily sidequest
Beat the 3 main arena stages
Collect half of the trinkets
Go home early