I can see that the difficulty is a part of design. With that in mind I would wish for a shorter reset animation (that allows you to move, but annoyingly does not allow to jump) and for a full-screen view rather than a tiny window.
I could not correctly time the sequence of "hold K, jump, release K, hold K, release K, hold J" in a split of a second, but that is exactly what you wanted, didn't you? Still proud of how far I could go.
Cool art (and animations, amazing attention to the details!) and music, perfect disguise for a Kaizo game!