Same as the above two. considering you guys are indie, Im frankly amazed you dont make better use of twitter and rss to keep potential customers updated. the longer you keep between the release of the XBLA version and the pc version, the less you get to benefit from any positive press the XBLA version recieved. But then, you know this, right? you're not stupid guys. there has to be some sort of reason that for all intents and purposes, there's nobody home here.
you counter this by communicating with your fanbase, keeping them in the loop. There's No Mac version. ok, why not? "no" isnt really a valid answer. "no, but it'll work with dualbooting, or No, but you'll be fine with an emulator" is more helpful. even the more-positive but entirely laden with bs "we have no plans for that at this time" is more friendly.
Update us. Tell us you're still waiting to here back from the publisher, or that code is in a final review process. if you really dont have anything new to add, post concept art for new mistbound games. keep us drawn in. Throw out a poll asking us what direction you'd like us to take the game in. you dont have to listen to the results, but you DO have to engage with your potential clientbase if you expect to make sales.
Right now you're failing at PR. the sad part is that you're an indie Dev and nobody expects much, but you still cant be bothered. Get with the program.