Terrific game! Very short. I would have liked to retry the boss battle when I died (instead of starting over from the beginning), but the game is short enough it didn't matter. Would love to see a fully fleshed out version of this game.
Being able to retry a battle (and even a proper save system) is definitely a good idea for a longer future version. Thanks for the feedback, and I'm glad you liked it! I'm already toying with how I might lengthen the experience in the future.
One idea I had: you could add a shield in between the enemy sprites and if the player hits it in the middle of the bite animation, they take half damage or something. (And it only shows up in later levels when enemies do a lot more damage.)