This is great. It's a pretty simple yet fun game with charming visuals and sound. I love the CRT aesthetics and that general old-school vibe. I hope you continue to work on this. You could add different themes, environments, castles, difficulty modes, maybe some kind of a reward system if you're feeling ambitious.
One minor thing I'll comment on is that all the characters have the same lines. It's not a big deal but I think if they had their unique lines it would add a little bit more charm.
Overall, a really solid effort. Nice job!