The Belgian scored a stunning goal for the second time in as many weeks to put the Toffees in front before Spurs fought back to secure a late 2-2 draw at White Hart Lane.
While Moyes was happy with the 25-year-old's display, he admits that Mirallas needs to be more consistent.
"It was a terrific individual goal again," said Moyes. "I thought he got better.
"I was disappointed with him in the first half as I thought we needed more from him going forward and also at times when we didn't have the ball I needed him to help us a bit more.
"But that's why you have those players. Those players are the ones who can waltz past a couple of people and get you a goal."
The goal was Mirallas's seventh for the club.