Not a bad game idea at all, I like the premise!
It would be helpful to have the description or at least name of the buildings on mouse-over, as they're not obvious what they are on first play except for the field. The very beginning is also pretty punishing in terms of food for the first cloudling; if you don't immediately merge with a field it's game over in seconds. Definitely would be interested to see this with more tech/progress or mechanics. Maybe some way to destroy buildings or break off parts of the island.