Super cool. Love the atmosphere. Especially for student project. If you by the way wanna find out what's causing the lag just use the Frame Debugger inside Unity Editor. Start it before it happens at the start and record the spike. Then you can directly see what calls are causing it.
Viewing post in Lucky Or Lost jam comments
Thanks so much for playing and for the feedback! I think it might be related to resource culling. I actually did an optimization pass halfway through development and built a WebGL version back then. The initial stuttering wasn't nearly as bad during testing at that point, but I ran out of time and couldn't apply the same optimizations to the rest of the content.