Zombie Tower Defence

i made it to passed level 100 but became swarmed. I built 3 mazes, i would close 2 open one and just kept doing that over and over. Eventually they swarm all my mazes then came the lag.

Game is freezing up. Tried a dozen times, same every game.

This game does not have a valid reason to exist , 1) because it is absolutely impossible to finish it , 2) because it has only one unique campaign , 3) because within the campaign , it has only one unique mission , 4) because within the mission , it has only a single map , 5) because within the map , it has two identical levels of difficulty ( *Normal* and *Hard* ) , 6) because within each level , it has 200 completely unbeatable zombie waves , 7) because from the wave 150 , the lag that it acquires freezes it completely and it is unbearable , 8) i have tried with a quite powerful machine , along with Firefox , Safari and Chrome , and it is still the same disaster , in short , do not lose more than ten seconds to play it ... horrifying ...

Like TDs with mazing, but the blurred borders makes it annoying to hit the right place.

so sad they didn't take this further. It has all potentials to be a REAL TD. I don't mean quests and bs, but some sort of progress-tree, combos etc. Like in the good old td-days