Playing a unit is only half of it. Points come from getting units out of your base and onto battlefields.
Your score
12345678
8 wins
Grove of the God-Willow
Open — nobody is standing here
Navori Fighting Pit
Open — nobody is standing here
Your base
Shipyard Skulker3
Traveling Merchant2
Your hand — 3 cards
Hextech Ray
Falling Star
Flame Chompers
Remember
Moving exhausts a unit, and any move triggers resolve before you conquer. Taking an open battlefield scores 1 — but it is the battlefield that scores, not the unit, so a second unit walking into ground you already hold adds nothing.