Just played through the whole thing and I loved it so much!! I have a kobold character who is also a sword-slinging spellslinger and I've always imagined like, a metroidvania where you do exactly this?? This is literally kinda like my dream game lol, I loved it!
The movement is super fluid, there's really good variety with the combos (I love the inclusion of aerial attacks) and the spells are great. It's a lot of fun to punch out the combos to prepare them and then the payout of casting them feels really great too.
And the sword boss felt extremely well designed? I won on my first try but it was by the skin of my teeth.
This such a cool project and I really really hope you continue to work on it. I'd love to playtest this so much. This is gonna be the most kobold game of all time, I can feel it :D