Thank you for the feedback.
For the pixelated look: I couldn't find any suitable assets for my idea, so I tried to draw them myself, at a very low resolution for the sake of simplicity and time. Despite this, it still took me way longer than I thought, with the result that you can see.
As for the aiming: the cursor movement is not completely random but follows a randomized noise curve, and the effect gets stronger over time. It was a simple and quick way to add some challenge. I didn't try to make it make sense, but I think it can simulate the shaky hand of a nervous shooter.