The game's intro makes it clear that this is a smaller part of a larger experience, and I think that focusing in on the smallest version of a concept or an aspect that can be expressed as a self contained work is a good approach for a game jam. Unfortunately, there is no indication of what that larger experience is, and so it's hard to have context for the intent behind what's here.
I encountered a couple of bugs - I was able to eat food multiple times if I ate without picking up and then didn't move. Sometimes I would eat automatically, and I couldn't work how what the trigger for that was. The music didn't loop, and the game also segfaulted on exit. I think there's room for a lot of polish in what's here.
I think some environmental variation would go a long way toward making what's here feel compelling. I know that you had a fog of war planned, but I think something (such as walls/obstacles) that would give the player something to navigate around in order to to be able to weigh up multiple paths that would require different levels of energy expenditure would benefit this iteration a lot.
Outside of the jam, I have some of that context for that larger vision for the project, and it is exciting to me to see some of this project manifest, even if it's minimal. I'm looking forward to seeing more in the future!
I do need to ask whether you are providing appropriate attribution for any pre-made assets that you are using. That's part of the jam's rules, and attribution needs to be given on the game's page.