not long enough!!
The screen will go dark after about 90 sec. b/c it is wanting you to buy the full ver. the demo should last longer.. if it did i would buy it, i think.
The graphics on this game arent the best, but they seem to be good enough to make it worthwhile. The physics are mediocre, and definately could use some improvement. The gameplay is actually kinda fun, but something keeps happening where the pinball machine just goes dark and locks the flippers. That is annoying and should be addressed. In other words, the game seems like an alpha version of a product that, once completed, could be really awesome! I will definately avoid paying for the full version until things get better.