this is one of my favorite games ive played from the jam so far, its super well polished, and the gameplay is really addicting. i didn't finish all the levels as they can get quite difficult, but id like to double back to this later, its difficult in a good way.
i think this one has a ton of potential to be expanded into a full game, the one thing i'd really focus on is sprucing up the art a bit. the gameplay is great, the music and sounds are perfect for the kind of game this is, but the art feels a bit plain. still i must stress how well done the rest of the game is, you've got something great going here!
besides what i mentioned, add some modes, add more content, perhaps introduce some new mechanics and i think you would genuinely be able to sell this as a full game. outstanding job!