This looks like it has the most potential. The white cube and the red laser both look very bland, though. If these were improved somehow, I would definitely consider using this one!
I agree with the rest here. The beam looks a bit bland. Aside from maybe changing the texture, What if you make the color not the same as the place the beam is coming from? This gives the feeling it’s not attached to the bottom of the ship thingy, making it a bit less bland. In case I’m vague, I meant something like this:
Another (relatively) simple thing you could try is adding a (point)light or any other effect at the beginning and a (low quality) “hit” effect at the cube. I think I’m being vague so once again here’s an image of the areas I’m talking about;