The game seems to be a good idea, but I can see a few things to improve:
1. You destroy trees & stones, but you don't gather them
2. I was able to gather some berries, but I couldn't eat them
3. Where can I find some water? Rain would be perfect :)
4. How to escape/fight with the reptiles?
5. Sometimes I got a glitch. I could went inside into a stone or go through a dino.
6. And there was a problem with using multiplayer and friend invitation (please double check connections)
7. Sometimes I had plain island, without any trees or stones. I think that it was because (temporary) slow internet connection. Consider catching data.
Hope the game will expand, because it seems to be a very good idea :)