I was unable to launch the Linux version. I think the binary file is 0 bytes for some reason. (Fixed in the latest patch.)
I played the Windows version. First I played the tutorial. But then when I tried to start the rest of the game, my player was unable to move. I went back to the tutorial and was then unable to move there either. So I quit the game, then ran it again, and this time it worked.
I played through the first level. I found it confusing without a UI to show the weapon options, and it never was clear to me if the placeable wood blocks were infinite. I understand that a lot of the game structure is placeholder right now, but right now you can just stock up on as much materials as you want without leaving the safety of the first area. I feel like there either needs to be some danger that eventually makes you go to the next area, or maybe there are better materials in later areas.
I do like that you can shoot shield skeletons to stop them, then fireball to defeat them. I want to see more interesting interactions like that. It seems like all other enemies that I found so far can just be attacked with anything without thinking other than avoiding their attacks.
I played through the second level too. But there was a 2x2 unbreakable stone hole at the bottom that fell past the ending area. I thought it was a bottomless pit because of how long I fell, but eventually I hit a bottom. But I was trapped there, so my run ended there.