Basically, the mechanic is roll a plus or minus, even or odd, high or low, etc - but no matter how you define it, each plus is a degree of success (or brings you closer to success). The number of beans, dice, coins, mattresses, etc you toss depend on your score in that attribute. It really is that simple.
Still, this rulebook includes not just 3 character classes, not just 3 stats (yes, they are linked in a sort of way to the 3 classes), not just a fairly comprehensive spell list, equipment list and bestiary... it includes a solo adventure and a GM / group adventure. All in 30 pages. All for 2 bucks.
Heck, you don't even have to roleplay animated beans... you could go strictly old school with the races if you want. I think you could flex this system into a pretzel and it wouldn't break ;)
From the publisher's blurb:
BEAN! is an easy-to-master, rules-lite, d2 RPG system, and the latest stand-alone title from the Fabled Worlds RPG game system! Perfect for introducing new players or children to the hobby, BEAN! is also great for veteran gamers who enjoy flexibility in their rules. Complete in one simple volume, spend less time reading and more time playing! The highly versatile and customizable d2 game system is unique and quickly memorized, so simple, yet able to handle any situation on the spot, without having to thumb through volumes of obscure rules. The best part? You get to toss your beans! With a d2 dice system, you could use standard dice for "high or low" "odd or even" rolls, you could toss coins or any other objects that have two distinct sides, but we recommend plain ol' beans! They're cheap and plentiful, some people really enjoy customizing their own beans, and a handful of beans keeps the game moving along quick and easy!
Simple, versatile, and sometimes silly, welcome to BEAN!