I don't really see why everyone is complaining about level 29., I got it on my first try. Just make sure that you fall at a diagonal, so you avoid the spikes, essentially falling between them in a sideways zigzag.
Survival mode is just stupid right now. I've been killed more times than I can count because of holes on the sides and when the computer gets something like a RPG, guided missile, or dark matter. Please let us disable hazards and items like in DM.