Look at it this way, Woodstock. You played the game once, and you enjoyed it. Play it again, and again. Maybe you’ll eventually find that it doesn’t work for you, maybe you won’t. If you do, how long do you think it will take to find that out? Months? Years? Meanwhile, you’ll be having fun with it.
All the while, we’ll be working on Alpha. If you find that the game ends up sucking, you can always switch to the completed Alpha then. It will be like getting a whole new game for free. As Dark_Destroyer pointed out, there will be fan-made components out there to replace the ones that came with the game, so there won’t be any problem keeping up with the changes.
Does that sound like a plan? :-)