Oh this is looking very cute! Good work! I love your people sprites.
I'd imagine the game will be busy enough once you're managing four couples at once, so I wouldn't worry about it not being fun yet. If you need a puzzle element, though... maybe each person only says they want something hot or cold or sweet or savoury, etc, and you have to serve a meal which both diners like? (though that's a lot more coding to add this far into the jam) Or maybe some couples are completely incompatible and you have to spot them and move them on quickly to make room for couples who'll have a better date?