The Ghanaian lasted the entire duration as the Black and Gold were held to a 1-1 draw at home by Chicago Fire in the season’s opener on Saturday.
The former Ashanti Gold man joined Crew from Russian outfit Anzhi Makhachkala as a Designated Player via a Discovery Signing in January.
"[My MLS debut] wasn’t bad," Mensah said, as reported by his club's official website.
"I did what I could do and I hope I improve game after game.
"The result wasn’t what we wanted, but a lot of positive stuff and we will pick it up from there and look to the next game.
"[The atmosphere at MAPFRE Stadium] was good. This is my first time and I really liked it. I hope it’s going to continue like that."
Ethan Finlay gave Crew a 17th minute lead but Ghana international David Accam restored parity in the 73rd minute, turning Mensah inside out after Harrison Afful failed to clear a through ball.
"I didn’t really see what happened before [David] Accam got the ball, but I think it deflected from one of our defenders," Mensah said.
"[Accam] got the ball and he shot really fast and it went in. We need to work on that and improve."