This is really nice! I've not heard this style from you before and you've taken to it well. I'd be curious to know what inspired the title? This reminds me of a genre of compilations on YouTube with 'medieval party hits' I sometimes put on when guests come round for drinks! Just a tip as a whistle-player: for realism, try to imagine how it might be to play the instrument. In particular, there isn't really any breathing break in this for the whistle, which would make it pretty impossible unless the performer had robotic lungs :D
I'd love to hear more medieval jams from you!