Thanks for the feedback and I'm really glad you enjoyed the game. Honestly was a bit worried that it'll be too hard, but I didn't want to wash out the mechanics by making them too easy either.
About the boss fight, didn't have the time to implement the art or the fight completely, so that might be the issue that was causing it to be confusing. It's a fight that can be finished but with no visuals or feedback, it's def hard to understand how to damage the boss and what damages you.
Other than that, I'd say I have the same gripes and likes about the game. Not enough depth in some mechanics (like the combo one) due to not having enough time or not having enough motivation (burnout was real at the end of the jam :D)
And again, thanks for the great feedback! It'll be valuable in the future for sure, in this project or another!