Yesss, it's another Nekolag game!
Love the artwork! The hard pixel motion tween animations look really good.
I think the battles could be a little more interactive. Right now there's a lot of idle time between attacks. You can try adding another gameplay mechanic so the player has more to do while waiting. Maybe clicking on enemy bullets to decrease the damage they do, or a couple of special abilities with cooldown times. Just something to keep the action going.
I found the griffins on the fourth stage to be the hardest part of the game. I think they should be a much later encounter.
Other than that, I really like it. Are you going back to working on Perv Alert after this?