Rules:

1.Do not place portal on black blocks

2.When you go by fizzler with cube reset it with an dropper

3.the cake is win

4.if fallen to lava restart whole map



You need 1.2.5 Forge + Modloader



https://www.curseforge.com/minecraft/mc-mods/portal-gun/files/2232223



https://files.minecraftforge.net/net/minecraftforge/forge/index_1.2.5.html



https://mcarchive.net/mods/modloader



I think that you cant install mods for 1.2.5 on normal luncher anymore so i recomende doing this on MultiMc



https://multimc.org/#Download



And this map use these texture packs



https://www.planetminecraft.com/texture-pack/aperture-enrichment-x32-wip/



https://www.planetminecraft.com/texture-pack/aperture-enrichment/