Really a beautiful pixel art, nice animations and curated graphic effects.
However, it is difficult to understand, the symbols are not explained in the menu, some like the shield I think I understood them (defense?), Others were incomprehensible. And so you can't even figure out how they affect your enemies.
The machine gun, however, is done well, if it had been more precise it would have been OP.
The idea is interesting anyway, I suggest you try again, maybe something very interesting comes out.