Doodle God：Puzzle - Tower Builder

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Build a skyscraper of sand and stone

1. Stone + Stone = Fire + Stone + Stone
2. Earth + Water = Swamp
3. Earth + Water = Swamp
4. Earth + Water = Swamp
5. Life + Swamp = Bacteria
6. Bacteria + Water = Plankton
7. Plankton + Stone = Shells
8. Shells + Stone = Limestone
9. Sand + Swamp = Clay
10. Sand + Swamp = Clay
11. Clay + Fire = Bricks
12. Clay + Limestone = Cement
13. Cement + Water = Concrete
14. Bricks + Concrete = House
15. Glass + House = Skyscraper

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