Obviously there are certain things that are a little rough, controls feel slightly unintuitive, art is scaled so it looks a little weird, could use more feedback so it doesn't feel so flat, BUT, critique must be tempered with compliments and you definitely deserve some. Afaik, this is the first jam you've done on your own and that's a great acomplishment! Creating a game on your own is no easy feat especially within such a short period so props to you. The idea itself also has plenty of potential to be expanded upon, I truly hope you keep working on this and end up with something much more polished and complex as I really, truly like the idea. That said, overall the game is a little rough around the edges but is definitely a fantastic attempt, very well done.