OKC actually shot better with a 42% FG (33-77) vs Miami's 36% FG (28-74). Both only made 4 3-pointers. OKC also had less turnovers with 11 vs. Miami's 12.
I guess they were just killed in the free throws where Miami had 31-35 for 88% vs OKC's woeful 62% or 15 of 24. Effective yun puro salaksak nila Lebron James, Wade and Bosh. OKC failed miserably to make the Big 3 make jumpers. OKC could've won had they made all their free throws.
Miami Heat also outrebounded OKC, 45 to 38. 14 of those rebounds were LBJ's.
Again, Defense was the answer. Indeed, a good defense is the best offense. There are no off nights in defense. You cannot really outscore a highly defensive team like OKC. You just have to defend them well.