Here is the full list of all 19 Soundodger achievements.
Complete 1 User Level
Create a new level in the Editor
Score 100% on any Normal Level
Score 100% on any Advanced Level
Score 100% on any Heart Level
Complete all Normal Levels
Complete all Advanced Levels
Complete all Heart Levels
Score 100% on all Normal Levels
Score 100% on all Advanced Levels
Score 100% on all Heart Levels
Collect 3 Hearts
Collect every Heart
Score 100% without touching the wall in any Advanced Level
Score 100% on any Advanced Level without using slow-motion
Score 100% on any Advanced Level while using slow-motion for 90 seconds total
Complete 5 User Levels
Complete 10 User Levels
Score 100% on every Level