Fantastic work with this one! First of all I just have to say I love the humour and writing in this one, it had me giggling all the time. I love how the game looks as well, I didn't expect the pixel art combined wih the 3D but it works for me in this. I also wasn't expecting the kind of 3D "roaming" sections either but it was a nice surprise.
I got the hang of things with the sensei but was definitely not ready for the signifcant jump in difficulty when I went onto the skeleton. But it felt good figuring out the most effective block/dodge combinations to beat them back. I still need to practice though as I haven't gotten far yet due to it still being kind of tricky. So really my only recommendation with this is for the difficulty to ease you in a little bit more at first (although the challenge is still a major part of the fun too so as always its a delicate balance).
I think that there is something beyond the gamejam here. I hope you get time to keep working on this one because I do think it would make a great full project. It really is so nicely polished already. Great work once again!