ok game; little bit easy. I give it a 4, as it is quite original and the last level offered a bit of a challenge. Also, for anyone having trouble with the path section in level 10: To avoid hitting the dots above you, let the character fall just a little bit below the level of the dot you want to jump over. For the section after that it's just a case of being quick.
Just one suggestion if you ever make a Rebuild 3; maybe do something to make the attack scenes a bit more interesting. Not really any point in watching zombies walk up to a wall, while the defenders just stand there...
@ 2years_too_young press 3 to equip the rifle, not 2. If the game is too hard for you with the weapons you have, then replay levels to get more money; and if you still can't progress, maybe you should play on a lower difficulty level.