Well, not really much to say. It manages to keep the environments and feel of the first game, as well as the sense of exploration. I'm not sure i like the background in the beach area. It's nice to see the primates, and the dark wolves again though. Long story short, hurry up and finish the full version. This game definitely lives up to it's predecessors.
Final thought: yes, a map would be nice. If you don't make it, some crazy fan will have to.