Sidney Crosby’s health is fine, and his two first-period goals Friday night proved his world-class talent didn’t go away in the five weeks he missed after suffering a broken jaw when he was struck in the face with a puck shot by teammate Brooks Orpik, ironically in a game against the Islanders. The Penguins superstar center, however, isn’t yet in playoff form. “As the game went on, I probably got a little rusty and probably wore down toward the end,” the 25-year-old said after Penguins practice Saturday, referring to Game 2’s 4-3 loss to the Islanders in which he racked up 23:21 of ice time and unleashed eight shots on goal. “That happens when you play your first game in over a month. Hopefully, it gets a little easier as far as timing and things like that.” Penguins coach Dan Bylsma said Crosby looked to be in top form in practice, sharp and skilled and ready to make a difference this afternoon as the teams meet for Game 3 of their knotted opening-round playoff series at Nassau Coliseum. “I feel good,” said Crosby, who had 41 assists and 15 goals in 36 games during the regular season and led the league with those 56 points before the injury. “It’s nice to get that first one over with. You never know what to expect. Towards the end I could feel it was my first game. “It’s better to get into it right away, get that first one done with, and hopefully get better from there.” Though Crosby credited the Islanders, particularly how they attacked and took advantage of Penguins mistakes to score the final three goals of Game 2, he faulted his side for failing to score over the final 52:38.