Something wrong happened with the order of room layers. Try moving the layers around. The layer with object setup should be below the wall tiles.
Yes i see but look :
All is good for me i think in order because if i move the configuration instance layer like that :
With instances containe light and blue wall , and instance_1 contain : obj_setup.
with that configuration you can see light no render, tiles is directly lite at 100%.
Do you know why ?
Sorry for not responding to this for a month. I don't know what's gotten to me forgetting about this itch page. I really don't know what's wrong because it works for me. I have uploaded a new version with more features, maybe you want to check that one out :)