A Legend of Luca · published
To increase the realism and immersion of the game the height of the rooms has been doubled and a ceiling put on top of each dungeon room. This improves the feel of the game tremendously by maintaining the illusion of the Virtual Reality™.

They were originally no ceilings in the game because with room scale mode the world would need to scale down and with a small play area the players head would often be well above the ceiling.
Now the ceiling optionally will turn off for room scale mode or in certain rooms where enemies do a high jump.
Additionally, we've made a variety of improvements and increased the base weapon firing rates by 50% to make the combat even more satisfying.