I bought core game kit cause it was also from the makers of master audio and tell you what:  it sucks.  What a complete waste of time.  It is so unbelievable complicated that no one in his right mind would use it.  I can't wai to write up my review on the assest store.  
I'll give pool manager a try.  BTW:  all I want to do is have 4 vehicles fire at each other.  When they get hit, respawn, increment the score and spawn a effect.  I have done this with playmaker already, but wanted a pooler.  That way I can get used to it.  but geez, core gaming kit sucks.  It's like you want to change a lightbulb, but they want you to change every lightbulb in the country first.
So will pool manager simple do this or should I just stay with playmaker?