Here is the full list of all 15 Demolition Engineer achievements.
Repaint the machine
Earn 100 coins
Complete level 1
Destroy your first building
Destroy 30 buildings
Destroy 100 buildings
Earn 500 coins
Earn 1000 coins
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