why does the spanish language option have a mexican flag and abbreviation mx? yes they do speak spanish in mexico, but it originated in spain and the spanish spoken in those two countries are slightly different
about the only way to beat levels in this is to save money to build better buildings to get better units, which involves saving money by not creating units and buildings that you need just to survive since the zombies advance in units created much faster than the player can. therefore this game is unnecessarily difficult, if there was a way to transfer your level to the next level or something it'd be better, but while you completely start over for each level, the zombies get better and better.