Brentford won on penalties after the match ended at 1-1, with Harvey Elliott scoring for the visitors before the Bees equalised through Aaron Hickey.
Andrews said: "We started the game a little bit tepidly - I thought they dictated the tone of the game in the first 10 minutes.
"We mentioned the steps we wanted to take as a group, compared to a few weeks ago when we played against them here, when we were forced low; that was really early days for us as a group.
"Even though we made a lot of changes tonight, I feel as though we're growing as a group, we're taking steps, in terms of what we do with the ball, and we're definitely getting there.
"After the first 10 minutes of the game, we started to dictate a lot of it, we caused a lot of problems down the right, and we looked really, really, dangerous.
"I was very happy with the reaction after that, and then the reaction after going a goal down. I wasn't worried at half-time, to be honest, I felt confident that we'd get back into the game."