The forward, 22, scored after 82 minutes against Lyon at the Emirates Stadium in London to spark a comeback in a 2-2 draw in the Emirates Cup.
It is only a pre-season tournament, but it was an encouraging fightback from the Scottish side as they prepare for the second leg of their Champions League play-off with the Portuguese side Braga.
They trail 2-0 after losing the first leg, but have home advantage as they seek to overturn that score on Wednesday.
Hooper travelled with the squad to Portugal but did not feature, Lennon gave nothing away about possible involvement in midweek but expects him to enjoy a good debut season north of the border.
"His movement's very, very good. Even first half, some of the runs he was making, when the ball was in wide areas," said Lennon.
"We just need him to do it on a consistent basis and I think he'll score a lot of goals for us."