I know this may seem like a pointless request, and may even cause some ridicule on my part, but hear me out. Minus stage progression and bosses, this game is mostly about farming. Not only that, but most of the farmed stages can just be autospinned once you reach a certain point in the game. If a player is just autospinning the stage, they already are not paying much attention to the game, and probably, like me, just do something else while waiting for the stage to finish.
Realizing this, I feel it would be nice to allow the game to run in the background so a person can multi-task during times like that, instead of being locked out of other phone/tablet functions while waiting for a farmable stage to complete.
Anyone else agree with me on this?