Here is the full list of all 8 Dot to Dot Sweep achievements.
Die with only one colored dot remaining.
Complete the first loop by beating level 10.
Survive for one minute without touching any dots.
Die within one second of starting a life.
Score 100,000 points.
Complete a level without losing a life.
Complete a level without breaking your combo.
Complete a level by clearing the board of all colored dots.