Oh boy! Where to begin.
The story is kinda confusing and in the animation it´s not explained well. Most of the story is explained in the description rather than in the animation, and even then it doesn´t explain much. it doesn´t explain how or why the gang is screwed, it doesn´t explain how "Penguino" (By the way, I don´t know if you tried to write penguin in Italian or Spanish, but just to let you know, the way you wrote it it´s incorrect) could help in any way, it doesn´t explain why there are devils in the Antartica and their purpose, it doesn´t explain why the protagonist is a penguin. It doesn´t explain basically anything about the story. Like you shouldn´t question it or something.
The character design is pretty bad, especially with the protagonist and villains. The main problem is mostly with the body and hands. They´re just pretty weird.
The guns are pretty nice. Some of them are great, while some of them have a noticeable lack of shading.
The backgrounds are possibly the laziest thing in the animation. They´re just empty white rooms. They don´t even have windows.
The animation is rather stiff. That´s mostly noticeable in the melee scenes.
And lastly but not least the font choice. I feel like it´s not worth talking about it but I´m gonna mention it anyway; Don´t use Comic Sans.
My conclusion: It has potential, but it´s poorly executed.