kind of a cool game, i like that you have to figure out the different combos by playing the game. one suggestion, you should be able to just drop a gem on a mushroom, instead of having to open the dialogue box and place it in
for sparta, i used the quake box and a rocket launcher, picked up a laser fully upgraded for ammo, then the rest in gunmen. that easy. zombies, use the pistol until they start hitting your wall, then change to shotgun and start blowing them away =)