The personal teleporter is hard to make
and is well worth it, because:
i was on level 3 and stumbled into a big red-walled blue-floored area
i neared a door with a green light and the ligth turned red
when i went to the other door there were 3 loving MECHS I stuff YOU NOT
that I couldn't kill with the cangun due to my health being on critical
guess what happened next