Love It! Nice work. Got me on a good jump scare too! A lot of nice systems and work here. Congrats on winning the competition, now I can say 3DObject played a part in an Award Winning Game! It's a great showcase, I'll make a dev log about it.
Feels very complete for a first game. Are you using high quality or low quality scaling? Low quality could help with perf if you are using high, with some image degradation, but might be ok for this image style. Good luck on future games! Also any feedback from using the addon is welcome.
On perf, one thing I do for perf is play with culling distant objects, or objects in non visible rooms (but within the viewport).