Thanks for the linux build, and marking it accordingly.
I recorded my run:
https://litter.catbox.moe/ryubf8.mp4
It's with no commentary, link expires in 3 days.
Right of the bat I am going to say I never played Slay the Spire, but I played another game of the same genre, so I knew what to do.
I got to the boss, but there was no boss. I assume it was just the end of the demo, and not a bug. (I wouldn't survive anyway)
Visual representation is good, and everything worked as expected.
I realized I never actually got to spend my gold.
Your itch page is empty, so I guess my question to you would be; what do you intend to do differently in your game compared to other games in the same genre?
Don't get me wrong, I think it is fine if you just want to clone a game you like, but I am wondering if maybe you got some bigger plans.