Colm
I just posted this in another thread. Hope it makes sense:
In case it's not clear how to open more gates in the Red Hall, you must choose a room on each "level" of the location. So, say when you first enter, you choose the food energy item, the next gate will open. Continue to the next section & chose another door to unlock & the next gated section will open. After unlocking a room in the 3rd gated area, the 4 gated tile in the middle becomes accessible & clears the location once smashed. Now you can open more rooms of you choose to with any excess rings, but once you exit the Hall, it starts the "refresh" timer.