The 42-year-old wants his side to seize the initiative on Wednesday night after the defeat to Brazil in their World Cup opener last week
Croatia were beaten 3-1 by Brazil in their World Cup opener last Thursday but were unfortunate to concede a harsh penalty and have a goal of their own disallowed having troubled the Selecao throughout the 90 minutes.
Cameroon are next up in Group A at the Arena Amazon, Manaus on Wednesday evening, with both sides knowing that defeat could put them out of the tournament.
As a result, Kovac plans to set his side up in a more offensive system and take the game to the African nation in a bid to get back on track.
"Against Cameroon it will be a completely different game. It was difficult to attack Brazil, we had to look through counter-attacks, but against Cameroon we will have greater ball possession and seek dominance.
"The first goal will be an advantage, it would be good to go in to half-time with a positive result. We know all about Cameroon, we analysed them like Brazil and will set our tactics accordingly.
"Our goal is to take the three points, and this is a game with growing importance."
The coach also seemed unfazed by the testing conditions in Manaus, stating that his side have profited from more rest than their rivals: "I think a rest day is always useful. Everyone has recovered.”
After the match against Cameroon, Croatia will face Mexico in Recife on June 23 in their final group game.