I have a question around gambling in the game, because i don't really remember much of that part from back in the day.

How come i can't hold, if i get two of the same fruits/whatever? Shouldn't i be able to?

And does the points you win in gambling just count towards your score, or what are you supposed to get before you win extra lives?

Gambling..
You can only hold if the hold buttons are flashing (like a real fruit machine). If they are flashing, move the cursor left/right and press fire on each button you wish to hold (under the reel).

The prizes at the top of the gaming board are the ones you want, ideally the level code so you can type that in (options screen) before starting a new game to be warped straight to that level.

3 Bottles of Lucazade = code for the level as well.
Otherwise Extra lives or points (they are in x1000 or something).

Oh, and if you get the chance to gamble the points you win for more points (it should be flashing on the right hand side of the screen) - don't do it. You hardly ever win (it's like a one in 20 chance or something).