Thank you for playing! Unfortunately, I was just a little too late to catch your playthrough live. It was a fun watch!
We also appreciate you taking the time to write your feedback in such detail.
We are working on a tutorial and hints system that will hopefully improve the experience for players who are newer to the genre. We agree with all your points. The lack of a tutorial is also the main reason why the demo has not yet been released on Steam, as we had concerns similar to the ones you raised.
The "mining" typo will be fixed, nice catch!
The level of detail with which you examined the butter knife card made me realize that we should be mindful of everything we place inside our game. I really appreciate you diving so deeply into this. We'll address all the issues.
There is indeed more to the demo. You tried using both the magnet and the string separately on the key inside the drain, but you never tried combining the items and then using the "magnet on a string" item to pick up the key. A hint system to guide you towards it would surely help.
We're glad to hear you still enjoyed it overall, and thank you for wishlisting it.