I am really happy I got a chance to sit down and read through this. This is a massive amount of output for the period of the jam and the creators should be very proud of everything they were able to get down on paper!
I love the idea of the sort of cross-universe battleworld made up of the last survivors of various worlds. I also like how much effort the authors put into making sure that so many different genres of mecha story were represented. This whole thing is bursting with creativity and they came up with some things I never would have thought of.
All that said, it's a bit unclear how all the moving pieces will work together in play. The game would benefit from more GM guidance, world info, and adventure ideas. As is, it's a really cool character creation system and will be interesting to see if the authors expand on it in the future.