Solve 10 2d problems

800 XP

Solve 10 2d problems.

200 users completed this achievement.

Completed by 23lin34kl@mozmail.com, xBx, Hỷ Trần Quốc, Varyag, joo kim, IvanIvo, jaokhun, Goshi, whsrty, Alex Weavers and more.