Looking pretty good

One thing I would suggest, tho, is maybe have the lasers flash or something, or have the center go transparent after it reaches full width.

Thanks
And yeah, that would be a great idea. I hope that won't slow things down too much. I'll try this next week (when I have less homework ). However, problems:
-Making them flash would make the player believe that they are gone even if they come back, so the player might walk into a flashing laser.
-Making them transparent would... make them transparent so we see the checkerboard through them, and that would be strange in my opinion (but why not after all ?).

So I found an easy method to get beautiful greyscale and I just implemented it in the game.

Good news: The grey is almost perfect on my 84+SE
Bad news: my 83+ crash while my 84+SE doesn't

I tried everything: run it with MirageOS (with zStart disabled), run it with zStart (shell MOS), run it with zStart (shell zStart), RAM Clear, ROM Clear, it still crash.
Even more strange, it is just the screen that stops refreshing because quitting still works () and it displays the score (so it refreshed the screen )
I'll try to fix it but if I don't manage to, I'll have to get back to the old greyscale method since the judges have 83+

Use an emulator ?? Then it already has perfect greyscale so my thing is useless

edit: I tried the 84+ emulator and the 83+ emulator and none of them crash (both are Wabbit)
edit: My sister's calc has the problem too

edit I'll "fix" it by adding an option in the "options" menu to disable the "beautiful greyscale"

Can't wait to get home to download this, i play it alot on my ipod ^^.

If your program doesn't work on my 83+... I'll be angry.

Same here ;.;

edit: I have 84+ respect

not any more...
Can't wait to play this game...

This looks awesome . It would be nice if the rock/ball sprites were not transparent, though.

For that I generally just refresh the screen every frame, erasing sprites in the process (no need to erase them in that case). However I don't remember if DispGraph actually overwrites the entire LCD (which would be required for that technique)