Surprisingly brilliant

While the title of the 'game' doesn't give anything away, it really should have a more informative title as this is probably the most surprising thing I have seen out of a Game Maker creation.
This beast is a WAD editor for Doom. Editor and tester - and it does a pretty good job at both. It doesn't rival ZDoom as such as it doesn't have all the flashy new stuff like DECORATE - however, because of this, it loads snappily and is probably better than Doom Builder for creating simple vanilla-style maps with no new features that many sourceports give in abundance. It's as if it's trying to be simple - like Chocolate Doom, but with considerably less bugs. All these put together provide a very smooth Doom experience - simply drag your IWAD file into the window and get it loaded.
And not only that, but the map editor is extremely easy to use - and, of course, as snappy as a dog owner's fingers. Which is interesting given that you seem to have infinite space to play around with, and loading a map with a whole load of detail (like that rubbish GothicDM thing) was a lot faster than any of my attempts in DB. And I'm using a netbook here, so bonus points for that.

There were a few small niggles with the program; one of which was a large bug with projectiles. I attempted to load a map I had previously created in Doom Builder - it seemed to work fine but all the projectiles from enemies seemed to pass straight through walls - giving me no hiding places. This didn't seem to happen with the plain IWADs or any custom maps I had made with the built-in editor. This needs looking into.
The other thing was that the interface looked hideous. Some antialiasing needs to be done there, methinks.