I'm designing a mockup for an inventory screen! It'll actually have both inventories displayed simultaneously, item icons, item descriptions, and best of all, a sleeping Maffi riding along in your inventory in the corner.
@skelltan Second inventory for items you pick up in the level (keys and such) that can't be carried outside the level. Probably need to find another phrase to use that communicates that more clearly that's still short enough to fit.