few quick tips: 1. get the upgrades that give you more money and exp, they're better than you'd think.
2. get rid of the birds. trust me: saving them for last isn't a good idea, because you need to jump over the zombies from time to time, and if there are a lot of birds you loose far more health than necessary.
this game deserves at least 4/5, but i refuse to give a game where i have to spend real life money to unlock stuff more than 3/5, maybe even 2/5. if there is ONE thing i HATE about the internet it's that kind of games.
the game DOES have a lot to do with assessing risks, but i think that's part of the point. someone with a phobia cannot necessarily assess risks in a logical way when faced with a choice between something they fear and something they don't fear that is equally or more dangerous. i would rather be set on fire than walk down a dark corridor.
Sounds like something Dr. Viled would do ;) Thanks!