tip how to defeat the final (2nd) wizard: dont go into the middle of the room, instead shooting from the top left, try to get slowly right while shooting and when you hear you are dealing damage (different sound than shooting the wall) keep firing. Those spider shooters wont spawn and you can easily kill him without losing a single life (and without seeing the mage too :-) )
I enjoyed this game. The survival was just waiting for the waves when you have rocket launcher, unlimited ammo and all upgrades. The unlimited ammo is not absolutely unlimited, through 52 waves it goes very slowly down x999 x998 x997. And I probably found 1 minor bug - why in the survival mode arent tesla mines? I got none though 52 waves.
I hate it when someone interferes with my backdoor.