The first part of the "Traps" level for Shinobi 3 is killing me! The game is pretty much a cakewalk until this level... I mean, you'll have racked up 7 lives and then burn through them all trying to make those @$#%#% jumps on those increasingly small stone platforms and winged ninjas throwing stars at you... Arghghghghghgh. You'll make a ton of progress and then one botched double jump and it's starting over from the beginning.
But it's such a fun, immensely playable game that I have to keep trying, y'know?