An alright try. Try increasing your FPS to 30 or 60, as opposed to the.. 6 or 12 you have now. Also, add this to the hero code:
if (_root.zombie.hitTest(this)) {
gotoAndStop("lose");
}
Assuming you have a game over frame named "lose" and you instance named the zombie "zombie", this should work.
Finished the game and made a 40m bridge! WHOOO!! Now I never have to play this crap again! And yeah, the best thing to do is finish the game for a lot of funds, then make really really REALLY strong steel bases on each side of the bridge and just connect them with a wood walkway. Trust me, it's very easy.