Interesting idea, I loved the main character and that octopus models, but I missed UI to show me if I was winning or not, like health bars, ammo, timer, etc. Also some kind of feedback would be great to see if I could dodge the boss' attack, etc.
It seems that the main character is not moving properly but I think your idea was to let he move around the boss to avoid attacks and so on? That would be a great mechanic to fit the jam's theme. The weapon seems to be floating also. Anyway, good project and cool idea :)