Here is the full list of all 14 Tezz achievements.
complete all levels
30 LEVELS
Complete a level with 5 blocks
Complete a level with a transparent block
25 LEVELS
Complete a level with 4 blocks
20 LEVELS
Complete 50% of the levels
15 LEVELS
Complete a level with 3 blocks
10 LEVELS
5 LEVELS
Complete a level with 2 blocks
Complete the first level