The Los Angeles Kings will reach the halfway point of their regular season when they host the Dallas Stars on Tuesday night.The first 40 games have gone better than many expected, but Los Angeles coach Todd McLellan believes there’s plenty of room for improvement.”We’re still putting things in place and we’re trying to keep our game growing,” he said. “If there’s a horse in front of us right now, so be it. We’ve got to make sure that ours is in good shape and ready to run.”The Kings were on a 6-0-1 run before losing 4-2 to the Philadelphia Flyers on Saturday.Los Angeles has allowed at least one power-play goal in the past 10 games and is ranked 28th of 32 teams on the penalty kill, but McLellan believes the unit is improving, especially from the first quarter of the season.”The group play and the reads, the reactions are there, we’ve got to get the job done, though,” he said. “We seem to give up one a night, in various ways still, so the number is not looking good. … Yet the penalty kill is improving. You might think that I’m insane, but that’s how we see it.”Dallas has won a season-high four in a row to stay atop the Central Division standings.The Stars are 8-for-17 on the power play during their winning streak, moving them into second in the NHL in efficiency (28.8 percent).Dallas defenseman Miro Heiskanen said the Stars have been working hard on the power play, moving the puck quickly and getting shots through to the net.”Playing pretty simple, not trying to do too much,” he said. “Just play it simple and work hard. You have to make clean passes, that’s the key.”Jason Robertson continues to pace the Stars offensively.He has 11 points (two goals, nine assists) during a seven-game point streak.