You say "...define a keyspace and it goes randomly through whole keyspace "it" (not sure what you meant by it) on each point, not just creating starting points and going in +1 increments."
I do not understand how this is random. It sounds like you want it to go check each point in the keyspace or do random jumps through the keyspace. I get confused when you say through the whole keyspace. What I have does the following:

top range/keyspace/beginning range you want to start with
800000
so that is a 24 bit top range

You define if you want random keys generated in all of 24 bit range by selecting subrange of 23; now it will generate random points from 8000000 through FFFFFF
if you wanted to search subrange of 16 bit you select subrange of 16; now it will generate random points from 8000000 through 80FFFF

You control how often it generates random points using the -r (rekey) feature.

But this program is designed to generate and regenerate random points in a given keyspace as often as you like.  It will generate your GPU grid size random points and go sequentially from each random point. Once it rekeys, it generates new random points and goes sequentially. Let's say your GPU gets 100 MKey/s; you could put -r 100 and the program would generate new random points every 1 second.

The difference is; bitcrack generates random starting points and goes sequentially until keyspace has been searched; the program eventually ends.

My program just keeps generating random points and it will never end, until you close the program down. It will never start with random points and walk them sequentially until whole keyspace is searched.