Cute concept, but I won't accept that the dog was a traitor. 🐕
I see a lot of potential here to be built on, especially in the final boss theme. I can imagine as the song plays out how I would build up the rest of the song around it - that bendy synth has a really cool sound to it and is an excellent foundation.
As another commenter said, changing things up with some different instruments and adding some rhythm or supporting instruments would go a long way for you. Nice effort, looking forward to seeing how you've improved for next time!