Thanks for pointing this out.
I think I accidentally uploaded 0.8 and labeled it as 0.8.11. This is my fault. Many of the bugs you listed were fixed in that build, so I have reuploaded it to Itch.
You've also pointed out a few that I missed, such as the collissions in the cave. Thank you.
We are looking to complete the game in the coming months, please look forward to it