Wrexham won the game 5 - 0 and put Steveange to the sword after they lost a man through a red card.
He said: "When they had a man sent off we were able to put our foot down a bit and kill them off, which is what we need to do whenever the opportunity presents itself in the future."
Stevenage started the season as bookies' favourites for promotion, but Tremarco said he was surprised how easily they eventually rolled over.
"I thought they were a pretty good side, but on that performance I'm surprised they are seen as favourites for promotion," he said.
"Our lads took their chances on Saturday, but you can never take such things for granted, but we also believe there is more to come from us."