Just an update for anyone with a similar dilemma who finds this thread. I decided to buy it anyway and it runs fine.

Awh, oh well. Thanks for the advice. I may start saving up for a real computer now, I think.

Hi all. I've just played through the demo/tutorial version and found it really good fun; it ran without any slowing or other issues. I was about to buy the Alpha version when I noticed that the minimum requirements are for 512mb of dedicated video memory. I would be running the game on a mid-2010 Ma...