It's Almost Like Some Sort Of... Places

its like a mod where you're stuck in the back of rooms!!

No but actually.. to begin with the performance theres no major impacts, though extensive errot spreading and initial generation of both The Backrooms and The Red Road do cause SOME lag, it doesnt last that long and is effectively only once per new world, beyond that theres no really noticeable issues.

For gameplay, theres a lot of interesting little things found far enough into progression here, though at times you're just roaming aimlessly in a mostly empty office space with yellow wallpaper and annoying lights but its the backrooms so what did you think. But theres also sodas and candy bars which could be seen as the equivlant to potions here though usually on the weirder side. Beyond the backrooms has the red road, and the structure bridge, along with some other smaller places. In which those have a very different gameplay style and different goals, such as the white endergirl in the structure bridge which can help you clear out errot, along with the red road having an easy supply to redstone and aluminium. The structure bridge also introduces structure keys for fast travel across different dimensions within the places.

Atmosphere however is really the best part of the mod, the backrooms is executed perfectly, and while there is a lot to do here, it feels like theres so little here at the same time. Theres also stranger anomalies such as errot landscapes themselves, along with the towering Menger Stalkers found in the large rooms. The Red Road after some time is weirdly unnerving to its immense use of one color, that being a darkish red within this strange mostly lifeless space. The Structure Bridge feeling like an otherworldy hub dimension you can stay and do whatever in, and other places such as the manilla room feel very safe, the ridge's atmosphere being dark and oppressive, with the abnormal reality of Cave_Game feeling like a lifeless, forgotten world yet on the surface appears as if everyone simply disappeared all at once, with decay never being truly present.

For a general dimension mod, its good, and for a backrooms mod, its the best one you can find