Here is the full list of all 13 Neon Junctions achievements.
Finish the level in under 20 seconds
Complete the first level
Complete the seventh level
Complete the fourteenth level
Complete the twenty-first level
Complete the twenty-eighth level
Сomplete the game
Complete the secret level
Spend three minutes to complete one level
Collect 99 cubes
Complete the level with 49 cubes
Restore electricity
Die