Very nice, great job!
Kangaroo was the 2nd arcade game I ever played and have great memories with it.
My father bought me an Atari 2600 with a Kangaroo tape, just to keep me away from the arcades.
As André said, the Atrai conversion was really poor, so I went back to the Arcade in a a few days.
I also have a SUN pcb, looks like a simple game, but it is huge fun and quite challenging from stage 2.