This map was quite fun, once we've noticed you have to play it in adventure mode. Sadly we didn't find any clues regarding this so we played for 40-50 minutes in survival mode until we put the pieces together.

For how the map is "intended": we're unsure.
Especially, we are still unsure how you should be able to get to the monument island in the middle. We spawned on the "first" island (not the middle one) so when we completed its quest we just flew over in creative, set our spawnpoints on the middle island and then we died purposefully on each island once we got the wool to get back to the middle. No idea how that was intended. However, this meant if you click on any bed in the whole map, you couldn't respawn in the middle and had to cheat again.

There are at least three points during the playthrough where you could get stuck and could not progress any further.
1. Using or losing too many emeralds/lapis items would stop you from progressing. Thankfully keepInventory is on and there's an abundance of them. Just something to keep in mind.
2. Falling into the end portal (if it's off!) in the overworld without having ender pearls means you can't get out since you can't place blocks.
3. Going into the end without ender pearls would also lock you since you can't die but you also can't get out of the hole you spawn in.

Also the progression on the third island should be fixed imo. Not only is the hint text inside the shulker box in French, it doesn't translate well or doesn't help at all. We found the way through pure luck. (The tip in the comment section inside the spoiler tag is very blunt but at least it's helpful.)

I liked how the islands had their own theme and their own objectives. I also liked how the mobs were different on each one. Sadly the durability of items (especially armor) wasn't that great. I think giving out unbreakable armor would only benefit the map.

The enemy drops were as interesting as they flooded the inventory. It's good there's a chance you can get
but overall the inventory was flooded with strings, bones, rotten flesh etc.

There was also not enough food in the map. Yes you can go back to the pig spawner (which is breakable btw!) but that's so annoying if you're halfway through the map. Just put more food into chests pls.

Another thing: please add a maximum amount of a specific mob in an area. This was especially noticeable with the blaze spawners. Afaik you can set that up in the mob spawner itself? (It doesn't work perfectly as it only checks for the amount around the spawner, 3 blocks vertically, tho.)

Can confirm this is a fun map, great playing with friends :) made for a very fun video on our group channel!

I like the CTM map! I have a question, I have no idea what to do on the 3rd island.

emm so I was thrown in a random place with no islands and I kinda dont know what to do... are there any coordinates or sth for me to teleport?

A good CTM Map, like!!!!!

Looks cool. Btw, there's a CTM Community Discord, people there would probably be interested in the map.