I'm sorry to hear that. There might be some memory leaking issues that I never caught which makes the game unplayable on lower end devices. I only tested it on a medium to high end device. Though if the game never started at all it might very well just be that just running the html unity file at all caused a crash. Since the only thing present at the start are some fade in/out effects and simple "move onto the next scene if space is pressed" code.