There are a lot of cool ideas here! I like the idea of having to switch between farming and defending yourself. I also like how you have to physically carry the fertilizer back to your pumpkins, so you have to make that decision of being able to shoot or carry a useful item. That's cool!
However the way the nighttime portion of the game plays out can be pretty frustrating. Since the enemies can shoot you from what seems to be any distance you are basically flooded from all sides by projectiles. So I only ever really was able to get close enough to one or two enemies a night to kill, which meant I wasn't really doing anything during the day, since I only ever had one or two fertilizers to move.
I think it'd make a big difference if there were either less enemies, they had reduced sight range, or you zoomed out the camera. If you could just see what was shooting at you lol. Regardless though, great job! Like I said I like a lot of it!