You're a cute little bunny and you have to avoid the other bunnies from stomping on you and at the same time try to stomp as many opponents as possible. Jump & bump is multiplayer only with up to four players simultaneously. Gather the local crew and have a blast.

Jiffy plays with the arrow keys
Fizz plays with j, i, l
Dott plays with a, w, d
Mijji plays with 4, 8, 6

Network play
freshmeat record

BeOS (screenshot)
CVS
Source (Linux, *BSD, Hurd, Windows, BeOS) tar.gz Debian GNU/Linux package
FreeBSD ports
RISC OS
RPM package (src, i386)
Mac OS X package
Windows (screenshot)
Windows (old but with networking)
DOS | bzip2 for DOS/Windows

Level making | Level selector (screenshot)
Latest 15 levels
Contact | irc.gnu.org #jumpnbump

bald2.dat.bz2 as .bz2
bald4.dat.bz2 as .bz2
bald6.dat.bz2 as .bz2
bathroom.dat.bz2 as .bz2
bathtub.dat.bz2 as .bz2
beach.dat.bz2 as .bz2
blutopia.dat.bz2 as .bz2
boat.dat.bz2 as .bz2
boring.dat.bz2 as .bz2
bubble.dat.bz2 as .bz2
1 (2) 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 (Total 178 levels)