Great story!
The unpredictability itself was enough to keep me glued page after page. Add in the dark humor, twisted anecdotes for death and sheer impractical nature of correct choices and you have a gripping tale that you can completely immerse yourself into. Also would like to add that the writing itself and use of specific optimistic terminology was great, for e.g "and put the now half full bottle of water in it ( your pack)". Considering the circumstances, optimism would be your greatest ally, so very well thought out choice of wording.
