I played it for a while and found it enjoyable.
I ran it on Linux Mint and it seemed to run fine, but it ended up crashing around 40 minutes in, and unfortunately I wasn't running it through the terminal, so I didn't see if there was any output... I'll try and remember to do that next time, so if it happens again; I might get some sort of error output.
I found some of the user interface things a bit odd... Like how clicking on the visible inventory on the side of the screen didn't switch the active item... I know that using the number hotkeys does this, but it just felt odd that I was using a mouse and I couldn't select them with it. The distance that you can place blocks never reaches the inventory, so it just seems counter intuitive not to be able to click on them.
Another thing that I found odd was when in the shop interface; you can only close it by clicking on the very small "x" and not by hitting "esc" or clicking outside the shop window. There were actually a few times where it seemed logical that hitting escape would exit something, but it didn't, like when viewing the tutorials.
Other than that, everything else seemed to work and felt fine. I think music could really add to the experience... nothing brash, but maybe something ambient and with a moderate melody... I actually think it would be sort of cool if the music was contextual, where it starts out with the ambient wind that you currently have, but slowly changes depending on your current height, sort of suggesting that you're now in different areas and have met new milestones.
I found the narrative tone to be quite charming and probably the biggest reason I'll be coming back to it. I'm interested to see where it goes. Just before it crashed; the shop keeper had started building his pipe contraption (of which I was just starting to steal). It was neat to see the narrative moving forwards in that way.
Great work so far. :)