Sure, here's the Website:
http://distortedtravesty.blogspot.de/You can download each DT game there, though the first two don't have to do that much with Castlevania. You can also download the demo of the third game and play through the entire CV Gate (though you Need to finish Gate 1 (Mario) and Gate 2 (Zelda) before
).
Though to clarify on the Content of the third game it is not all about These so called Gate levels. Each Gate represents one chapter. There are 6 Gates, so 6 chapters that are these kind of stages, the rest takes place outside of the Gates. This overworld is structured like a Metroidvania and it also has some smaller dungeons scattered all over the place.
Yeah Gate 3 is pretty awesome though I feel it lacks something. I myself as a beta tester think that adding two more enemies might help. Also that Sky Castle (area 6) doesn't really add anything gameplay wise to the prevous Areas. What could it Feature for more variety? Maybe these flying balloon like creatures that would explode into several bullets from the original Sky Castle?
Well though the Gate itself shouldn't get that much bigger or longer, as there are other lng chapters and other Gate ´levels as well. What I do like though is the fact that the first part is a Classicvania area, whereas the second one is more of a Metroidvania styled part. Though it is not as open worlded as Gate 5 (Metroid). In case you want to know: Gate 4 is Megaman X.