Here is the full list of all 20 MatchyGotchy achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Let at least one star die.
Take 300 selfies.
Have your star fall asleep 10 times.
Heal your stars a total of 10 times.
Win the game! Get 100% explored on Xanadu.
Build a total of 1000 ships.
Play games a total of 50 times.
Fill up hearts 100 times.
Level Guru Moon.
Eat 100 burgers.
Clean up a total of 10 times.
Level Doctor UFO.
Level Spacey Galaxy.
Level Loony Lander.
Experience sugar rush 10 times.
Build 10 ships and unlock Xanadu.
Level Pirate Planet.
Level Speedy Sputnik.
Survive all stages: smol egg, tiny baby, awkward teen, rocket surgeon.
Level Matchy Star.