I really liked the low res aesthetic of the game.
I think that I see the way that aiming is intended to work, however, having the player character blocking such a big portion of very relevant screen real estate made it extremely hard to aim at the enemies.
Maybe a couple of shaders that show both the outline of enemies once the player character is overlapping them from the viewport and a little dot signaling the crosshairs, or raising the camera enough so that we could see the contact point of the laser would make drastic improvements to the game.