The game sounds fun from what you describe, and if you think it's fun, go for it! Unfortunately, I wasn't able to play your game due to a WebGL error, so I can't get you much feedback on that end ^^;
Game Jams usually challenge you to make a game prototype in the shortest amount of time possible, so it's natural you'll find many places in which you can improve. The choice is yours if you wanna continue working on it, and if you're excited about it, I would personally recommend you do just for the fun and fulfillment it brings!
But anyway, it's all up to you if you wanna continue fleshing out your game.
Cheers!