Despite the heavy margin of victory on Monday night, the Super Eagles wasted a number of opportunities when one-on-one with the South Pacific islanders' goalkeeper Xavier Simin.
The five-goal triumph leaves the African champions top of Group B, however, and Keshi insists that he is pleased with the team's performance ahead of their game with Uruguay.
"We had some chances, they needed to bury the goals," he told reporters after the match. "When you play a game like this you tend to give the opposition team the confidence to come back.
"They scored their goal and reacted a little bit. I'm happy with how we did and we'll see how we get on against Uruguay."
Support in Belo Horizonte was largely in favour of their Oceanic opposition and Nigerian goals were not celebrated with much fervour, but Keshi dismissed this as having an effect on his players at the Mineirao.
"Most of the supporters are Tahitians or came out to boost their morale which is normal," he added. "As a professional player you don't need to worry about that."
Following their clash with Uruguay on Thursday, Nigeria will face a final group game against Spain on Sunday.