First of all, thanks so much for taking the time to provide such detailed and valuable feedback! I am especially honored by the mention of Thief, it's actually one of my personal favorites, and I always look to it for atmospheric inspiration.
I’ve noted down your suggestions regarding the stealth balance, visuals, and that specific Godot backtrace error. I'll definitely be addressing these bugs and polishing the mechanics for the post-jam build. Thanks again for playing!