As if this month wasn’t flying by fast enough already, we’re pleased to announce that the speedrunning platformer delight Mr. Run and Jump is ringing in the new year with an exciting content update that seriously ups the ante on replayability. Today, Atari introduces an all-new game mode to the neon speedrunning hit: Ghost Mode. With this new feature, players can continuously improve their playtimes in any timed trial level by racing against a “ghost” avatar, essentially pitting players against themselves. After all, what’s a more satisfying achievement than conquering your best time? In addit…