I also restarted after the crash event on the 4th floor. Got back to the 4th floor and can't even progress as far as before the restart. Makes a zombie killer downright sad on the inside.
Similar results. I made it back to the 4th floor but can't progress even as far as previously. Too bad as the concept is cool but the execution is poor.
So, after constant event restarts attempting to get to the Boss of level 4, I "quit the event" from the options page. I was able to rejoin the contest at the first level and retain my weapons, equipment and green skulls. I made it to the 3rd floor…