The concept is great, but I feel like the execution could have been better.
The art styles are clashing, you should pick one style and stick with it. Even if you're not good at art you should at least try it yourself instead of using pre-made assets. It probably isn't as bad as you think. Remember that YOU are your biggest critic.
Also, AI music is against the rules. Once again, just try it. It's not that hard to make a simple beat.