We categorize the game as a hybrid scifi/dieselpunk/fantasy game, with various types of magic and technology from the various worlds. We like to joke that the goal was always to create a world where rapiers and rocket launchers coexist, and we feel that we have done that quite well!
See, here is where I start to get wary. Two general conclusions I have drawn from looking at a procession of game settings over the years, in an admittedly strictly amateur capacity. 1) individually cool elements can be more or less than the sum of their parts when combined. D&D races plus cyberpunk - a lot of people think was more-than. But adding, say, Cthulhu (not that you say you are, but just for ex.), probably less interesting these days. Is it peanut butter and jam, or ice cream and steak pie (on the same plate)?
2) a film can get quite far on just looking cool, although some plot is still ultimately required. For a game, I need to know what the PCs
actually do, at least as a default assumption. In D&D, go down a hole, kill monsters, take stuff etc. In Traveller, keep a tramp freighter flying. Cyberpunk, do runs. What does "dieselpunk" actually mean to me as a gamer about what I should expect to do in your game? Whatever the answer, why is that more interesting because there are bits of the setting that are scifi or fantasy themed? Not just why does it look or feel cool, but why is it game cool?
If there is a conflict, it needs to be compellingly tied into the conceits of an interesting setting; because starting from cold, the fact is neither I nor most readers are likely to care about whatever factions you have invented on their own terms.
In terms of your system, 5 levels of difficult from "a child could do it" to "world's top experts required", inclusive, feels a little narrow to me. Also, stages of success is not new - a lot of systems have it e.g. off the top of my head, Mythras / d100.
I don't want to sound overly negative and I am not even sure you are looking for feedback. I really like seeing interesting new RPG material and I wish you success. You can take or leave what I say, obviously.
Welcome to the bear pit...