Emerging free iOS apps: 100 Floors, GifBoom and Race or Die 2

This week’s free iOS charts are led by independent developer Tobi Apps and its game 100 Floors. Released on May 4, the puzzle/room escape game challenges players to figure out how to activate an elevator with no instructions. Players may have to push buttons in a certain sequence, shake their phone or discover hidden clues within the level in order to advance.  The game is similar to DOOORS, another popular room escape game that hit the top of the iOS charts in March.