Here is the full list of all 24 Minoes achievements.
Achieve a score of 100 in Endless Mode
Complete the Seagull Constellation
Use a Bombomino in a combo
Complete the Snake Constellation
Complete the Narwhal Constellation
Complete the Ostrich Constellation
Complete the Beaver Constellation
Complete the Dog Constellation
Complete the Starfish Constellation
Complete the Crocodile Constellation
Complete the Deer Constellation
Complete the Elephant Constellation
Complete the Dinosaur Constellation
Complete the Alien Constellation
Achieve a score of 500 in Endless Mode
Achieve a score of 1000 in Endless Mode
Achieve a score of 2000 in Endless Mode
Achieve a score of 3000 in Endless Mode
Achieve a score of 5000 in Endless Mode
Complete 'Quick Scoring Survival' in 2:30 or under
Complete 'Nearly Finished' in 5:00 or under
Use a Syncomino in a combo
Use a Gravomino in a combo
Use a Sweepomino in a combo