I have a question..
How can I made paths in level 13?
PS Sorry for my English...
I'm not sure what you want. What do you mean by making paths?
I mean that the bots could run around on the map
Since I don't know how skilled you are at modding Oni I can give you an overview.
One is by editing the bsl scripts for the level. You can look at the scripts for level 13 inside GameDataFolder/IGMD/dream_lab. You will need to learn the scripting language so you can modify the scripts.
Another way is to edit the flag locations, patrol path and character data for that level, this will take a lot of time and effort to learn the how to do it.
What you are able to accomplish depends on how much you are willing to learn the techniques to mod Oni.