Right now in game seems like you can do about 5 things. Run around in circles, swim, some terraforming, gather some resources (grass, scavenged items from junk piles, twigs), and do some crafting (basketweaving, tailoring, leatherworking, toolmaking, weaponsmithing). So, not much really to see yet. I'll hold back my opinion, and recommendations, until i see more of the actual game.

Edited to add: The crafting system does seem promising though. Easy to understand, not that time consuming (time involved is just gathering materials), and plenty of variety by the looks.