Really sorry for the late reply and thank you for the kind words! 🙏 I think we've already discussed some of this on Discord (unless I'm mistaking you with someone else) but I will address everything anyway for other people to see:
1. I'm also on Mac. Haven't tested on Safari though so need to look into that! Thanks for reporting.
2. Yeah, wall jump is unintended and really annoying. Need to fix.
3. Yes, the sound engine I wrote has many issues at the moment that I hope to fix soon.
4. That single pixel is interesting. The only thing I can think of is that it's in "particle mode" which currently makes it not grabbable due to a bug. If you find a way to reproduce it, let me know!
5. The no arms bug was resolved in a hotfix.
6. The single pixel is due to a mechanic that is a leftover from the freezing mechanic being the blueprint for scoria creation (where it's a way to avoid annoying single pixel ice). I still haven't looked into the implications of removing it for lava but it should probably be fine.
Thank you for the feedback!