The black lasers could maybe look better, I think that you should make them look like electric arcs.
Yes, they are ugly. In the real game, they are not black but white inside and orange outside, but, first, the calculator doesn't support the orange color

and secondly, my program would be too slow if I make it support white objects: I would have to reload the back buffer each time (see, the rolling stones are transparent, not white).
And electric arcs would be awesome but even slower and harder to code

But thanks for the suggestion

Or you could make them 6 pixels wide instead of 8...
(I'm not sure this will be better, and anyway they are not that ugly)

I just tried this on my calc and it is far better like that !
Thanks a lot

(and yes, they were that ugly

)
edit: This even adds an unexpected effect that the 8 pixels used to hide: see the thing "gliding" on the laser
Edit (Netham45): Removed broken attachment, please reupload it.
edit (Hayleia): Done