Thank you for the feedback!
I was debating making the orbs proximity-based instead of raycast, but for the sake of it being "self-explanatory" I wanted to make sure the player is looking at the orb to see the energy flow into it, and positioned the gate such that the lights display going up is visible at the same time. If I made this into a full game I would probably change some of that.
I agree that it would be nice to have an ending, but imo the only ending that would make sense in a game like this is a bossfight after 2-3 floors, which I didn't have enough time to implement.