3rd annual offline tournament "Best of the best"

There are some issues with the time limit. If possible, I would appreciate an extension until Wednesday. I am at the beginning of day 5, and the gameplay is generally not difficult, but the digging takes a lot of energy and time. Tip: when there are many zombies, be careful when transporting them; I accidentally ended up with -25000. Luckily, I noticed it right away.

P.S. What is this surprise? When completing the event, you receive artwork that is not indicated in the editor. Why?