The system requirements posted elsewhere say Win 7, for whatever that's worth.

Oh, I wasn't expecting a quick response! Thank you! While I was gone, I spotted the actual dev in another forum and I asked him the same question directly. I was about to come back here to delete my post, but you had already answered my question! xD

I appreciate your reply. :) If the actual dev answers my question, I will let everyone here know too.

Update: The dev confirms that dotAGE should work fine in W7. :)