I made an account because I received an email from YoYo Games about the Jam. I got excited because "NEON" was actually meant to be a visual theme in the game. My project is older than 2 weeks, but I never saw any rule about that and I actually got scared a bit when I saw this thread AFTER submitting the project. I mean, the last thing I want to do is offend the community or cheat in my first jam. And the truth is, I do have an advantage over anyone that did this in literally 2 weeks, but I also haven't just "changed skins" or whatever. The project is pretty complex (for me at least), I recently learned and implemented vertex shaders and pretty much rushed to have a working version for this event. If the organisers or community think that's unfair, by all means, I'll de-submit. All I want is to expose my game to gaming communities.
I completely get that putting together a project start to finish in 2 weeks is fun, challenging, takes a lot of knowledge and work, but if you ask me (as a first time game submitter/developer/game jammer), I think at least some of these events should simply be about personal projects that people are working on and are trying to go forward with (if you know any of those, by the way, link me).