I think the game is fun.
If more updates are coming and you're looking for suggestions, how about making an option to get hourglasses on the hour for an example?
Or adding minigames where we help the characters with any problems. Maybe we get to deliver any important files to Kang, or cook with Yoosung? Pet and play with Jumin's cat for a change? 
I think mini games like these could add to interacting and getting to know the characters better and make the game more fun too. A fun way to get hourglasses and hearts faster, besides the other options.