I'm really angry I just missed the rating time, because I would've given this a 5 in everything! The game has such overwhelming style and polish to its gameplay and visuals, the simplistic art style lends super well to the combat, and animations always telegraph attacks.
The music has a classic 8bit feel to it, and I really, really like retro music like that. On top of that, it fit extremely well with the action, especially with the final boss.
The combat and movement is quick and very fun. Every attack you deal has an amazing feel to it, especially that finishing blow, reminding me of the finishing blow from Shovel Knight. Every boss telegraphs their moves well, and have a wide set of moves. I especially like how you are immediately thrown into action, as you are taught the mechanics. On top of that, every boss also has a strong personality, with the last one feeling truly powerful. It certainly has enough polish and class to make me want a full game out of this.
It's a little touch, but I like how the game tells you how bad you were at the end, with the "you got up x times". Overall, one of, if not the best from the jam.