In multiplayer, Nerf the Zombie Spawner level upgrades to just 4 per upgrade, Pretty much destroyed players by spamming the upgrade button on Zombie Spawner and getting as much crystals as possible.
to go to secret save file hold CTRL and C and press 2nd save file if it fails try again it cant be patched you can get lots of stuff using secret save file
Yes.. happens. But i cant reproduce this. That's why i introduced the "skip tutorial" button, so if such things happen, you can continue anyway.