Game is a certified Kino. Gampelay is fun and interesting. Love the mechanics, having to stun the enemies with the gun then using the drill attack to deal more damage. The spritework is amazing, especialy the animations. Holly Wacamoly.
Just a couple of things:
This plataform is very hard to spot. I thought I had sloftlocked myself or something:

The pause menu bugs if I try to select options with the controller. (I'm using a PS4 Controller):

And there seems to be a couple of visual bugs in these stones. I think it's due to the ressolution of the screen (my monitor is a standard 1080p though) :

Other than these minor things, the boss felt a bit hard/bullshit to me haha, but that might be skill issue. I always got trapped at one side of the screen. If I did a drill attack on it, it hited me back (I felt like I should have some invulnerability when I do the drill attack? ). I could not break free of the tounge attack. Not even a single time.
Fantastic work!! Looking forward to see more!