Here is the full list of all 15 Demolition Engineer achievements.
Destroy 100 buildings
Unlock all styles of painting
Upgrade all stats to the max
Earn 1000 coins
Complete level 5
Complete the game
Destroy 30 buildings
Complete level 4
Complete level 3
Repaint the machine
Earn 500 coins
Complete level 2
Earn 100 coins
Complete level 1
Destroy your first building