Really cool idea. I absolutely love games where you have to optimize your approach in order to get the most out of them. The visuals are also really good, and I really appreciate the simple but well-understandable UI. This can really make or break a game. The overall atmosphere is also nice.
I have to say, though, that at the beginning, it was kind of hard to understand what to do, so a small tutorial would be awesome. But I get that's a lot to ask for in a jam.
Besides that, I think this is a great starting point, and I am really interested to see where you take it from here.
Good job!