The red barrels explode. The brown barrels are full of ammunition and full turkey dinners that pop out and land gracefully on the ground when you hit them. The metal barrels are indestructible, don't even try.
You're mute. This is never explained. If you're feeling frisky, you might bust out the old "...". Your teammates not only aren't irritated by your refusal to speak, they somehow understand you perfectly and are happy enough to do all the conversing.
There are only two ways to be: completely alive and fine and able to run and jump and cartwheel, and DEAD. If things are REALLY complex, you may be able to grab your side or limp a bit if you're two hit points away from game over.
Edit! Every single woman is model-quality gorgeous with enormous breasts and perfect skin. Furthermore, they all seem quite happy to stroll around wearing more material on their arms and legs than their chest and hips, which are covered with bits of bead and string. Maybe you'll encounter a fat or ugly woman once, but rest assured she's totally evil, gob-head stupid and will probably die eating something.