Lillis, who has been leading Town alongside Steve Eyre since Simon Grayson's departure, saw his team take a vital point at the expense of runaway leaders Cardiff. A goalless draw is not always a result to leave coaches gushing, but Lillis could not have been more pleased.
"We had 11 captains out there and I am massively proud," he said. "It was an important point and that's two clean sheets against two top four sides now - Cardiff and Crystal Palace.
"The players have showed great spirit, endeavour and passion and that's what a manager wants to see."
The Terriers have taken four points from three matches since the sacking of Grayson and Lillis added: "The players can't be in a comfort zone. I don't know whether I will be in charge for one week, two weeks or three weeks but it's important we get points on the board.
"I will just keep going and say the right things to the right players and every point we pick up helps this club. I love to see the players put that commitment in."
Lillis refused to be drawn on whether he wanted the manager's job full-time, and added: "The chairman and the board are going through an interview process. My only previous experience was one Championship game as caretaker at Derby and we just keep going."
Cardiff manager Malky Mackay actually saw his side improve their position at the summit after rivals Leicester lost to Peterborough. That may have contributed to his good mood at the end of the game.
"It's another point gained for us," he said. "We were playing against a team that is now unbeaten in six at home and they are playing for their management.
"They had a five-man midfield with 10 men defending the final third but we have to get used to that. I will always take 0-0 away from home. It keeps us undefeated in a difficult division."
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- Simon Grayson