I can host a server only on weekdays

I think I'll use your Idea, Skull. Sprtk is a runner-up if it doesn't work.
Realism, sorry, I can't host a server.

(Edit) Better, yet. I'll mash the Incinerator and Test Facility together.

You are stuck in a facility where you wake-up in a room and have no memories, and you have to getout of the facility. Where there are lots of tests, parkour and mind boggling thinking stuff.

hey if you want to host it ill help make an adventure map with you im 14 and i use redstone alot alot of my work has been stolen but i dont care,ill still help i was thinking we could make one using potions and ender pearls one like a parkour map and btw sptkr isint that basically *spoiler* the end of portal 2? btw if you want we could do a technic pack adventure map

Maybe a factory-type adventure map? You could start out on a conveyer belt, and have to find a way out before you become incinerated. The factory would however, be abandoned. And for some ideas, create a piston-smashing conveyer belt, a blender room?, a cobblestone factory, and a farm factory? You could most likely think of more ideas along the way. Hope you like my ideas!