minecraft custom map ideas

i've been thinking a new map like survival island but no crafting building mining or breaking blocks.
you may ask "where will i go at night to prepare for fighting mobs or sleep through the night" well i will add safe houses scattered around the map with mini challenges that are not required to complete. if you manage to find the minecart station before collecting 1 item from each safe house (probably coal or diamond) you will need to go and find them. each safe house will provide food, coal, and 1 diamond each, and furnaces will be in there to cook any food. at the start each player will be provided with weapons and iron armor. you may kill any and all animals on the island for food. once you have all 8 coal or diamonds you can unlock the door leading to the tracks, but beware there are traps triggered by detector rails you only get 1 chance at this map and 1 only. multiplayer must be used because more fun and less of a challenge. for up to 4 players (im only putting in 4 beds and will not change my mind) any ideas for this map are appreciated and ii don't have it complete yet, just thinking of ideas, also let me know if you like this idea or not i would love to hear other's oppinions. bye