Here is the full list of all 13 Miniballist achievements.
Congratz you have made it to level 50!
Congratz you have made it to level 40!
Congratz you have made it to level 30!
Congratz you have made it to level 20!
Congratz you have made it to level 10!
Congratz you have made it to level 5!
You have collected it for the first time!
Congratz you have made it to level 1!
Congratz you have made it to level 60!
Congratz you have made it to level 70!
Congratz you have made it to level 80!
Congratz you have made it to level 90!
Congratz you have made it to level 100!