Two Birds, One Machine of Destruction

◇ INTRO KILL, KILL, KILL!You are a factory worker tasked with preventing the migration of birds. Your gracious employer has hooked you up to an incentivizing machine that allows you to use the hearts of the fallen birds! However, let a bird through and, well... You'll see. ◇ CONTROLS At work, you are permitted the use of one Rodent-Shaped Computer Input Device™ (RSCID for short) that has two bu…