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