I went to level 23 before I decided not to finish it.
The simple controls are good, but some of the execution is very clunky. Namely the backdash mechanic, at no point did it ever feel good to use, because you're always auto running forward anyway, so it will always feel like you're fighting the controls in vain. I hated anything where I was forced to use it. The sword however was great, give me the sword from the start of every level with those sound effects and explosions and its instantly a better game. The forward dash on it felt good, but could obviously be better given you die from contact damage accidentally moving into the 2 hit enemies.
One other thing of mention, somewhere in one of the early levels, there are a series of jumps on a lower level, the knight's head doesn't really fit so it obviously doesn't have collision, but the parts you have to squeeze through on the jumps have to be a specific height, and your jump is variable. Even when I thought I was doing a short enough jump, I still needed to go even shorter with trial and error til I got it, they were a bit unnecessary and not really giving a challenge of "wow I did it" more of a "Oh boy, kaizo mario bullshit with extra steps"
Most of the levels I played were somewhat enjoyable, but not without problems. It's not the kinda thing that sticks in the back of my mind that I need to go back to. The music is the highest point