、！
Come on, walk smartly!
Literal
Look-[emphatic-っ], briskly walk-[emphatic-っ]!
キリキリ is a mimetic adverb originally for sharp, stabbing pain but extended to 'brisk, quick, efficient movement' when used with verbs of action — 'quickly, smartly.' The command キリキリ歩く would come from a drill sergeant or an impatient elder urging someone to move faster. The small っ at the end of both ほらっ and 歩くっ indicates clipped, emphatic pronunciation — a written device for capturing sharp vocal delivery.