It's all just polish now. I just recently added more standard difficulty modes (old saves are set to Normal mode automatically, and new games get to chose), which also adds an Easy mode for anyone who wants to be able to just get through the story. I also put up the Mac build... which was about as much work as I expected, but seems to be working well. I'll keep working at polishing that stuff up, and squashing any last minute bugs, but it looks like the game will be leaving Early Access very soon (likely the week of July 26th).
One thing I wanted to mentioned before it happens though is that I will be adjusting the game's price up a tad for release. The current price was based on it being Early Access and not having much content in the begining, and I never changed it because, why would I, it was still Early Access. Now that its going to be a finished game, I wanted to get it in sync with other games of similar scope. Its actually going to be a small adjustment (I still want to be on the cheap-side comparatively), but I still wanted to mention it since that's the kind of surprise nobody likes. So, if you have been holding off buying the game, and you want to save a few dollars, buy it now ;)
-Sean