So, after nearly 2 hours, I did what I couldn't in the last decade and finished Xtreme Mode and Just Ridiculous. The soundtrack kept me on the brink of sanity for both latter halves.
I want to say I'm glad I got it over with, but the game still manages to be fun platformer in spite of all the frustrating moments it gives you. I guess you can't not enjoy wholesome zombie love and endless amounts of death for all else involved. Only criticism I can think of is that cheats don't get saved if you refresh the page.