I don't know, it was worth it to me personally on some level, but not as much as I wanted it to be.
Hmm, I guess I could see it your way. You really didn't think you accomplished much? Was it due to the numbers of sales? Probably not, but let me tell ya something bro. A good number of the gamers nowadays (sorry if this is a generalization) are a bit more into the violence games (which is ok, but there should be a nice balance) than deep thought story telling games like Aquaria. And that's a sad observation(fact?) in my opinion.
At first glance this game "may" look a bit kiddish, but it really isn't. It talks about life. It talks about peoples mistakes and the outcome of them. This game really has a deep deep level of thinking if you sit down and think about it. And to me that's a rare gem in the swamp infested game industry these days.
You know I may be spinning wheel or rehashing things many have said. But for what its worth, you guys did great with this game. I would gladly take it over any of the first person shooters coming out there.
My question to you overall is: What "is" worth it?
Oh and good luck with those other games i've read about. I'll keep an eye out for them. 
Mt two cents.
I strongly second this opinion Alec, your game is awesome in many ways and I am finding that so I haven't found a fighting game that pleases me even half as much as Aquaria. (That is my opinion only so please no counter arguments please)