Nice game! I like that the cat is green, bonus points for the green cat. And the art for the house is pretty impressive for having done it all within the jam time period. Out of curiosity is the game beatable? I think I get the idea of it after messing around for a bit, and I presume based on the lil' chime noise that despite the counter not showing any keys something is detecting them- or at minimum the code is rolling for it, perhaps its not tracking anything behind the scenes.
(Also I can relate to the not having time to explain the game in the game thing, I share your pain XD)