I think the game needed some more variety. I enjoyed using the attack/slashes but I felt after a couple of minutes that I had done everything the game had to offer. I continued for a while and it pretty much felt that way still. The slash gates weren't compelling. And there was only one enemy for all that I played.
Though you could expand the concept into some hack and slash sort of game. I think there's potential there if you added some extra moves. Goodluck with the GB jam