The concept for the game is great XD
I'm also glad that this game have save feature. So I can continue grinding Love points. But sadly there is a bug in the game where the price shown didn't get updated even though the price is saved so it kinda confusing for me.
But, I think this game can be more enjoyable.
Maybe you can try adding showing dialogue every once in a while, and then each time it reaches certain love points/buy items, new dialogue unlocked
Adding a music will be good too.
You can also add a the current points gained every seconds from each items and always show it instead of hovering. So the player will know how much worth it to buy certain item or to save it for more bigger item.