Oof that's a long comment hahaha. I'll try to reply to every paragraph- but first of all, thanks for playing Mystopia, and it's great to ses you liked it!
We've recently changed how the non ground letter algorithm works, and that update will be live in the next few days. It should feel a bit better then.
You weirdly only got six(?) items (out of ten) and I don't see the Pentagram either, but I believe this will also be fixed in the next update. This bug might also only appear on the browser version.
The ground block progression was bugged due to me checking a wrong variable on the code (oops). It'll be fixed in the next update and you should receive stone, dirt etc. more, along with new grass blocks and water blocks!
The letters disappearing bug has been fixed, and it will go live in the next version.
For the critism part - don't worry, this is a great comment, and I thank you for it! We were only aware of many bugs you mentioned because this version is nearly a month old, but comments like yours helped us discover and fix them!
We have a major update coming super soon to both here and Steam. I'd love to see you play it again when it comes!