Gameplay 3.5/5 - Very nice concept I could see being expanded, I love the idea o the box limiting the space of your farm and having to manage space and layout. But currently, it's very easy to cheese and doesn't have much strategy.
Visuals 3.5/5 - Pretty good, very basic but they work what's needed and have some charm to them. Menus need some work though.
Audio 2/5 - As you said yourself, it has none so yeah.
Enjoyment 3.5/5 - It shows a lot of potential and it was an interesting playthrough but it has those bugs and things holding it back. Would love to play a more polished version though.
Theme 5/5 - As I said before, one of my favorite aspects is how the box requires you to manage space so good work there on the concept!