No worries...thanks for making the game! Yeah, as far as the tension level...it's all personal preference 'cause some people may be disappointed that it's not downright claustrophobic and oppressive like The Eight Pages. :) Not me, though!
I don't remember any stuttering, but I'm pretty patient so if it was only a little I probably ignored it even if it did happen. I can run some tests if you wanna tell me how to check for what you're looking for; be advised that I'm running the game on a system with an integrated Intel GPU (no fancy AMD/Nvidia hardware). These post replies may not be the best way for a lot of back and forth; feel free to reach out on Discord (same username) if you like.