here is the latest version of CowboyJumperEditor,
you can make your own level and save it,
there is a help documentation included,
to move around the ground click on the on it.
it is easy to save you own level,
it is just like saving somthing normally.
read the help documentation for help on more stuff.
just know that before you save it,
make 1 actor of each type that you do not need,
this way it will save everything right.
UPDATED!!!
you can also upload you levels to the forum or anywhere else for everybody else to play!