Thank you for coming back with such detailed feedback! Four spells already — glad you're exploring that far.
The long slowdowns are especially useful to know about. Do they happen in a particular location or after a specific action? Which browser are you using?
I agree that keyboard navigation needs to be more consistent, especially when Esc exits fullscreen. The bridge transition and clearer equipment slot labels also deserve attention. Your point about loot makes sense too: finding a new weapon should feel more meaningful, and lots of similar items make the inventory harder to manage.
I'll also check the quest display and the upgrade you couldn't select in your screenshot. I don't want to guess at the cause before checking them.
Thanks for spending time with the game and writing all this down — it gives me concrete things to investigate. I'd love to hear how the rest of your playthrough goes!