the visuals looks amazing! and how the theme was implemented was very smart! and i liked how you need to manage your bullets and making sure every bullet hits! the game is very polished and i like the music and the sfx!
but when you fight the first boss if you only have blocks of tail left... it's like a gameover! you can't get bullets or get food to make your tail longer! so this hurt the experience a little bit! but the controls were good! maybe make the snake turning a little bit faster and it would be a very solid game!
well done!