Scrolling screens would be difficult in BASIC 
Anyway, I believe there is a time limit.
It's not so much a puzzle game, but more a game of skill.
I spent minutes bouncing all over the place, while Zett himself reached the goal in no-time 
Scrolling screens would be difficult in BASIC
10 screen5
20 for n=0 to 255:vdp(24)=n:next n
30 goto 20
something tells me that guyver was referring to full-length horizontal scrolling
10 screen 5
20 for n=0 to 255:set scroll 0,n:next n
30 goto 20
don't know the exact syntax of the set scroll for V9958 
something tells me that guyver was referring to full-length horizontal scrolling on an MSX 2
*sigh* .. politicians, always trying to save their ass
Well, at least you have found out how easy it is to silence a politician. I guess he's still thinking how this can be done in BASIC.
They can try to use the Gfx9000 which has hardware omniscroll built in. Would make Sunrise happy as well and it isn't that hard with GBASIC.
something tells me that guyver was referring to full-length horizontal scrolling on an MSX 2
*sigh* .. politicians, always trying to save their ass
Heh... Well, you could do some nice tricks with the VDP(19) (R#18, the adjustment register) and a lot of HMMMs on a MSX2, but I assume it's impossible in normal BASIC. I recall a small scroll thingy which I wrote myself in NBASIC, using this method. It only went well when sprites were disabled (VDP(9)=VDP(9) OR 2), there were only 192 physical screen lines (VDP(10)=VDP(10) AND 127), and all used variables were declared as integer (DEF INT A-Z). Needless to say, the machine had to run in 50HZ mode (so make that a VDP(10)=2, on screen 5).
Of course, MSX2+/Turbo R is much nicer then , I mean, BiFi --> Tell me, how many MSX users (aside from me) actually HAVE a GFX9K?
And please, don't use SET SCROLL. Use VDP(26) and VDP(27) instead. It's much faster, the only nasty thing is that you have to do 2 extra calculations for the horizontal offset to fit in these registers. But just consult the V9958 technical manual (Yamaha) for that
It's not so much a puzzle game, but more a game of skill.
I spent minutes bouncing all over the place, while Zett himself reached the goal in no-time
Not an issue at all! You were playing on a Turbo R, remember?
You'll have MUCH more reaction time when playing on a Genuine MSX 2