Fireshot Fireworks funktioniert nicht

Fireshot is a fireworks and special effects photography app, using your camera tap anywhere to launch a firework rocket and experience an awe-inspiring explosion, celebrate achievements and occasions by creating your own beautiful firework displays and then take a photo or record a video to show your friends and family.  If fireworks aren't your thing then there's a wide range of other special effects such as missiles, fire, rain, snow, lightning and many more.  Play any of four game modes to unlock more fireworks, firework letters, numbers, and shapes.  Delay your launches or change the colour of your fireworks and effects with the new expanded UI.  Use the lock mode so that you can tap away creating as many fireworks as you like with a minimal UI.  Now including a variety of camera filters for more unique photos.