This is a really nice little arcade game.
I love the artstyle, especially the paralx background.
And the parry is a great bit of game design, it pushes the player to do cool stuff. And doing cool stuff is always fun.
I always felt like a true Roket Samurai when I managed to parry a laser.
I'm not too sold on the stamina, though. Especially later in the game it was hard to keep track of it and I died multiple times even though I executed a perfect parry (I think I did anyways :D) because I had no stamina left. I think a simple, short cooldown so the player can't spam the parry would be enough.
But anyways this is a great game and I had a lot of fun trying to beat my own high-score.
My best is 132, no idea if that is good or not. :)