This looks pretty solid for a free engine! However, I am unable to export the extension from your project as a .gmez because an error will pop claiming that I do not have the rights to. Was that intentional?
Basically what GameGeisha said. Give those tutorials a read, and if you have any issues after that then post a question for that specific problem. I recommend hooking up your Mac Mini to your PC via ethernet cable, then using your PC's wireless card if it has one. (GM:S transfers its files over to the Mac, and doing it over WiFi can be painful if it's a large project)
Intel Core i7 Q740 @ 1.73 GHz (turbo to 2.3 but I have it disabled because it's caused instability)
NVidia GeForce GTX 460M
and GM:S runs completely fine. I usually float around 1300 FPS on a non-intensive game. There were a few times where the FPS dropped below 60 and after many headaches I narrowed it down to:
Power option being switched to power saver from switching to the battery and it would stay at power saver when I plugged it back in
AVG doing a scan on my computer, stopping it gave an instant FPS boost back up to 1300
Google Chrome sometimes taking up too much resources, closing it freed up some FPS
It seems like by this point you know it's not those things but I thought it couldn't hurt to share my experience with it. If my laptop can run this just fine then I don't see any reason why yours couldn't... this one is a headscratcher.
My (longshot) suggestions would be to unplug any USB device while running GM (I had a mouse/some input device that caused a massive performance hit to GM:S back in 1.1ish, but that was fixed) and try disabling turbo boost if you can.
Speaking of which, why do we need 2 snapshots for our marketplace stuff. most stuff I put up so far don't even need one snapshot... So I put up some crap images as stubs...
Speaking of browsers, the market place does not remember me via the in Studio Browser...
Agreed. What pictures am I supposed put up for scripts that are essentially just calculations? The screen shots should at least be optional for some categories (scripts) and mandatory for others (art). And the browser does not "remember me" for more than a couple hours either.
Small issues aside, the overall website design is very well done! I'm quite impressed.