The game looks nice and the concept is great and chill. Though personally I think the rounds are too long. By the end of the game the island was overgrown and I was making over 130000 pts/sec. The game should probably end after 8-10 minutes, so there would just be enough time to "finish" and fully grow the island. Also some of the elements are a bit unbalanced, like the animals --> they're cheap, small, easy to place and make lots of points.
Oh and the point counter keeps on rolling after the time ends.
Anyway, I still enjoyed the game! Could become great after a bit of tweaking.