A little over an hour in, and yes, so far, I seemed to have experienced everything this game has to offer. Sure, there's more I can do, such as built gorgeous structures, but for now I've played through all the games implemented mechanics.
To put it simply, this is another crafting game similar but not exactly like minecraft. While there are blocks, there are also many different shapes to build with, and the entire terrain is smooth and bumpy.
My first few minutes were rather confused. I had a pickaxe, a wood axe, and I was placed in the middle of a forest it seemed. My first instinct was to cut down some trees. A few seconds later, I watched as the tree didn't just fall into a pile of wood, or only gave me the piece of tree I was chopping, but rather actually cracked and fell over like a real tree, leaving a stump. (of which you can also chop for wood)
It was then I quickly found the crafting menu, and saw a few things I could make from the new wood I got, including a crafting bench. I was assuming with this bench I could craft things not available in my standard inventory, so I made one and placed it.
It's at this point you'd probably see that there is a long list of items that require no materials to make. That's because, this being an Early Access game and essentially a paid demo, the developer decided rather than excluding these fully fuctional items just because there's no recipe yet, you can instead access them to test and use. It's a welcome change from developers instead hiding these kinds of things from us. Sure, it adds no difficulty or depth to the crafting, but that's not the point right now.
You'll also notice you can make a "block bench", of which I did and placed it. It was here I finally found what I could do with all that wood. There are a TON of different blocks in this game right now. They're all pretty much functionally the same, but there are so many different textures to choose from. You can pretty much make any type of house or building you can imagine with many different types of wood, stone, concrete, tiles, metals, and even scraps. It really adds a massive sense of variety to the building in this game, something games like Minecraft were lacking for a very long time.
Again though, since the only two resources available in the game right now are wood from trees and stone/iron from mountains, you can pretty much craft and block with ease.
Aside from that there are multiple different light sources to craft such as torches, lamps, flashlights, spotlights; and a couple different weapons and tools like a pickaxe, woodaxe, broad sword, all at really no cost right now.
And that's it. There is a basic multiplayer mode with servers, and the animals in game are really just there for atmosphere since you don't need to eat yet and they don't provide anything when killed. There are no enemies except other players I guess, and there's absolutely no urgency. This is pretty much VERY Early Access, where the game is just barely functional with little to no content. Sure, there is a LOT to craft (even furniture and a WORKING PIANO) but really there's not much to hold your attention unless all you like to do is craft with no danger or cost at all.
When this game starts to develop more and add more content, I'm sure this will easily be one of the better Minecraft replacements you can get. There are a couple other crafting games that already show some great promise as well, but this is the one I decided one right now, so hopefully it will continue to be worked on and supported until it is done.