I decided to revive the old 2dmc mod from like 1.6-1.7.10 and recoded it for 1.12.2 as the commandblock thing where you can walk only on 1 block is a popular thing now.
In the pack you have only 3 block wide area where you can move. (you can only walk on about 1,5block area but the total width of world is 3 blocks for easier base building and overall gameplay).
Map includes automatic teleport barriers and world height barrier you also can punch mobs out of the world.
Default configuration is 3 blocks wide world. To change that you need to edit 2dmc.cfg file in your config folder.
<- that config value means your world would be 9 blocks wide
If for some reason your config file is empty, copy those lines into it. (config file is only needed if you want to change the default width)
for singleplayer: select "2D World" from the world type.
for servers: level-type=twod
You are allowed to use this mod in your modpacks/projects you only need to give credits and link to this page.
Our support discord : discord.gg/U4B6wEe