To share a bit of extra feedback here. Based on others feedback too, I would definitely try to make sure that your game makes sense to players. Its very easy in a game jam (especially solo, which I believe yours is?) to have an idea that you fully understand and have no issue playing. But sometimes players can struggle to understand it where as it might be second-nature to you by the time you finish making the game.
I don't think there is anything wrong with your concept at all, but I think it definitely needed some more explanation on how to play the game so everyone can enjoy what you spent time making. Time is such a valuable asset in a game jam. So, if you don't have time to create a tutorial level or some kind of tutorial screen for your game. Just try to make a quick video explaining how to play or update your game's page with a text explanation if you'd like. In most cases something like that isn't against jam rules.
Also, if you can I recommend asking a friend to try out your game and asking them if the game makes sense or if they can figure out how to play it without you having to explain it to them. Though honestly that isn't always an option with a game jam, but it is a good practice for any game you create.