4/5, Read below.
I gave you a 4/ 5 for the graphics and for the potential the game has. A few suggestions if you don't mind:
1. Make the choices more open so the player feels that the game is more open ended. IE: Make all the upgrades available for purchase at the beginning so the player can decided to save up for the expensive ones or buy cheap ones. The game feels linear as it is now.
2. Improve the "in town" mini game or remove it. The mini game feels anti climatic when the timer gives you like a minute to decided who gets which of the EXACT number of crops you just happen to have. Making the player decide who gets what seems more fun. IE: Deciding which townsfolk gets to progress their stores and who doesn't.
3. Building off number 2, you could make some of the townsfolk like or dislike you based on who you are favoring to give crops to. If citizen #1 gets crops all the time, he is able to further his menu while citizen #2 does not. Then you should offer rewards specific to the townsfolk who favor you.
Thats all for now. With some changes I think this could be a really cool game. At the moment it just feels too linear does not offer enough variety on gameplay.
Good luck to you!