Adding an extra ‘pump’

Hey guys!
I was wondering how could we make this game more fun to play and I came up with some ideas and wanted to share it with you.
1. Idea is adding an oil pump. It’s the same as the water and food genarators but with fuel. It would be really helpfuel because getting 100 fuel takes like 1 hour.
2. Idea is pvp between players. Like in arcade but with another player. Only headshot kills with a sniper rifle. (Other weapons wouldn’t work because of the spread and fire rate)
3. Idea is more daily challenges because everybody can do them in less than 20 mins.
4. Idea is a bit hard to implement into the game because it requires much more coding than the other opitions but adding a mini-game where you can play as a zombie would be fun or something like a ‘god game’ where you can release the zombies and creating challanges for the surviver.
That’s it for now!
What do you guys think?