Definitely need to consider the camera more next time. A number of people have commented on it. The music transitions were something I planned only if I had enough time left as I didn't really know how to implement the feature (at least not in a simple way). I proud of the jump though I wish I added more platforming movement mechanics.
In regards to the the attacking, there's a delay before you can attack again, which is standard for games but seems was a little too high here as you're the first one to say it felt like you couldn't attack. My question is did you know it was a delay before you can attack again or did it really feel weird, like you couldn't attack again?
Regardless, thanks for the feedback. I enjoyed your game too.