You'll be able to win the big money but the chance is slim.
As mention the out come is fixed at purchase (each game has an id number). If you close your browser before you exit the game completely (even after you've played) and log back on it tells you you have an unplayed game, and the out come is the same the second time round.
If the game odds were 1 in 4 then if the total prize fund was �15000 and there would be only one big win, �8000 say, then �7000 would be split in to smaller wins (4X250 100x75 1000x1 whatever).
As the game presumably would run until all the prizes are won so even if the big prize had gone 14999 would still win, albeit not as much and 45000 would still lose (at 1:4 odds) and if each game cost �1 then �45000 would be left over after the winnings had been handed out!
It been said before, Las Vegas wasn�t built by winners.
Still, love to watch the bunny dig up carrots!