Goddamn! I have no idea why it’s freezing so much - I’m sorry! I’ll have to dive in further. I can only assume it’s just poorly optimized.
In terms of the tunnel - at the end is a vent. Turn off the eye thing and you can travel through.
Again - I’m sorry it’s bein such a pain! Seriously appreciate ya trying it out - and 3 times no less. I’ll go into it more today and see if I can problem solve it.