Let me give my opinion in game. Game is quite good. But do you know what I say to add:-
1. Add music of fire and pour water
2. The particle of smoke is kinda confusing. Because of when fire is about to Extinguish it also made a effect as this.
3. I don't know how to move our pipe perfectly. Try making it better or giving a tutorial
But anything everything game is good. Modeling is good