I was confused with the movement for a minute because I don't know that the character Can't move up while attacking, I even misunderstood that I had to mash up input to fly up and collect some ammunition to be able to shoot, because I didn't know that I had to Hold the attack input and wait. After wasted time on figuring out the controls, I beat all stages a couple of minutes later.
I feel like the game lacks some essential user experience components but, the art and music are spectacular. Animations are so smooth and very detailed.