Fun: The juice in this game is great! I love the bullet casing sound effects and how they fly all over when you start shooting, and the screen shake is great as well. And spamming right click to pick up stuff was really fun too. There are some difficulty tweaks that could definitely improve the game, like being able to see ahead of you better for instance. But the decision to respawn you at the start of the level was a god send. I had fun!
Innovation: The concept for this one is really cool! Creating different bullets from different materials but the same 6 bullet casings was very inventive. Some of the bullet types (namely the grapple and broccoli(?)) didn't seem to have any real purpose, but I thought the sound(?) and fire bullets were cool!
Art: The art is very consistently good. I liked the Turtle screen transition!
Sound: The bullet casing and shooting sound effects were top notch and felt great. I also liked the music. I think the game could use a few more sound effects, like for each bullet type, to make them feel more unique, but overall the sound design is good.
Theme: I think you could have pushed the theme a bit further, maybe turning the the turtle shell into armor of some sort? Also the game technically revolves around bullet casings, not shells, but I think they're shell adjacent enough for it to fit the theme.