Ermmm, so. I read RaGAD once in high school, when I was even more woefully undereducated than I am now (also, had not read Hamlet) and Did Not Get It. Because in the same way that political satire isn’t funny unless you have a decent grasp of the political climate in which it was written (Gulliver’s Travels, I am LOOKING AT YOU POINTEDLY, you unfunny bastard), literary parodies require some idea of what they’re parodying (see: how Hot Fuzz is funnier than Shaun of the Dead because I am more familiar with buddy-cop films than with zombie movies).
If you, like me circa a year ago, have not read Hamlet, know that Rozencrantz and Guildenstern are the MINOREST of minor characters (they are, like, two lines shy of being Courtiers #1 and #2) and that in the end, they die. So in this play, they are the main characters and Hamlet is sort of going on behind them while they sit around flipping coins and trying to remember what happened before they were summoned here (nothing, because they are Fake People Made Up for a Play) and to figure out what is going to happen (they are going to die, because that is what happens in Hamlet).
And that’s sort of it. LITERALLY nothing happens, except that sometimes Hamlet (the play, but also the character) will waltz on stage and do a couple of things and then exeunt. But we read bits of it out in class and it is DAMNED FUNNY so maybe I take it back? If you get the chance to see this one live, even if you are allergic to Shakespeare and will not get the jokes, go check it out because plays performed are ALWAYS better than plays read to yourself, and the Theater of the Absurd is pretty hilariously absurd.