From publisher blurb:
This book has everything you need to create characters and run super-heroic adventures within minutes. The rules are light and easy all you need are two ordinary dice, a piece of paper, and this book. Character generation is so simple, you could fit all the info you need on a 3x5 card, but we included a sheet anyway.
Do not assume that by simple, we mean incomplete, either. Bash has over 50 versatile super powers, numerous skills, and even rules for collateral damage. The action is fast and furious, paced over a series of panels, pages, and issues, just like a comic book.