$30 seems entirely reasonable since they're still working on it. This is the third release after all. Used to play the original all the time back in the day and this one looks even better. There is a ton of customization available too.

Having said that, there's another reason why $30 seems reasonable. Ambrosia is one of the few Mac game developers out there, and while they've grown over the years, they're still in no way an EA. They're even very friendly. A couple of years ago, they sent me their logo in EPS form for my graphic design senior project - the only question asked was if there was any other way they could help.

I have no problem paying $30 for a great game from a great company.