Reminds me of One Finger Death Punch or Iron Snout, trying to juggle threats coming from both directions. I will say that since the same enemies always come from the same direction, it's too easy to get into a rhythm - shoot left twice, then right once, repeat. But still, it's complete (even has a main menu!), fits the limitations, and looks great (nice lighting effects), which are good boxes to be checking for a game jam. Nice job!

It's pretty good in terms of graphics. But poor gameplay? idk, I don't even know what supposed to do and then someone killed me instantly. In terms of difficulty this is too difficult and at least gives the player more chance to survive. Overall it's a nice game.

Next time, you have to focus on the gameplay first until it's playable and not the graphics.  Graphics are crucial too, but you can do it later. I think you are focusing the graphics much than the gameplay itself, that's why there are no sounds/music because you don't have a time.
Don't take it personally, I'm not complaining I'm just telling the truth that's all.

Nicely done.  I want a hat like that in real life.