The rooms are actually the same size as any other regular bitsies: 16 tiles per side. Maybe it feels different as it uses a first person view. I don’t know!
Ha! I actually thought so... maybe it's the point of view + the use of fog and the vibe + not sing walls, which makes them feel bigger. I'm making one game now, also first person but in closed spaces, with walls, and guess that's where resides the difference.