I first got my look at this kit about two years ago. I thought it needed work. It looked a little like a good concept but poor execution.
I registered the kit three days ago, I still can't believe just how good this tool is. It would have to be one of the most powerful game toolkits for indie developers ever written.
It still needs a lot of work. There are a lot of missing features and commands. It's also not for beginners - it is more of a tool for seasoned pros who already know how to code pretty well. The abstraction of the idea of the game itself is superb as reflected in the design.
Those game maker fanbois who have logged on to here to screech about their free toy's superiority, don't know enough to know what they don't know. Game Maker is a toy for amateur dabblers to experiment with 2D game creation. It isn't a serious development platform. I expect with another two or three iterations, Game Editor is going to be the only game in town for smaller developers with limited resources who want to design for three different markets at the same time.
Last night I had a triple parallax shooter with particle effects similar to Xevious running that took me less than two hours to code, complete with configuration menu, Ogg background score and 80 fps on a Pentium 400 that is farting dust it is so obsolete. I then pressed a button and output versions for Pocket PC, Linux and of course Windows. I'm still reeling with shock.
I had a huge 2D toolkit/map editor/scripter/resource compiler of my own I've been working on for two years in Borland C++ Builder, extremely complex and detailed ... I chucked it in the bin before I went to bed because I couldn't see any reason I'll ever need it again with this tool in my hand.
There are still quite a few bugs, it's a bit shonky in places and there are lots of things that need a cleanup or some more robust resource checking in a few places, but the honest truth is this game editing tool kicks the arse end off anything else out there by a wide margin. You newbies who want to know how this thing measures up to freeware crapola like Game Maker just don't understand what the vital questions are you need to be asking if you are an indie developer. You'd never want anything else after you figure out how the Game Editor desktop works. It's a quantum leap ahead of the other junk that is available. I know because I've had a solid review of all of it many times.
The biggest thing I'm holding out for now is Palm or Symbian support for end deployment. Then I can die happy.