I've not touched Demonstar for a long time so I thought I'd get back into it again with some new custom death levels and new bosses. This level is far more relentless than the previous.
on the level editor, click level then options, type B_BACK(1 - 18). It is sorted based on the level you found on the game. don't forget to specify if it is a space or planet
idk if u still need it but to get the mapmode file go in note pad and type in: set MAPMODE = TRUE Demonstar.exe **(or whatever yours is named) save it as Level Editor.bat put it in ur demonstar folder and open it