The door is interactable, and pressing the interact key (normally "E", and "X" on Xbox), takes you inside the house. While the player cannot explore as it is essentially just a menu, there are a range of options they can do - some of which are necessary for game progression.
7Zee Rewards Club7Zee Rewards Club
This option unlocks on Day 7 following a StarMail from the 7Zee Rewards Club. Here the player can spend Newbucks to rank up, unlocking exciting new upgrades, chroma packs, and ranch decorations, costing more Newbucks per rank. The maximum rank is 28.
StarMail is a feature in the game that allows NPCs to contact Beatrix.
Sleep Until Morning
Fast forwards to 6:00am the next morning, regardless of how much or how little time until 6am is left. All time-based actions such as slime feeding, plort production or garden growth will advance with the time that gets skipped.
Return to Ranch
Exit the house and be spawned outside the door.