1. Cutout and replace the backdrop. The trick here is to use the scissors icon. Then tap the diagonal lines. Select with outline the person you want to cut out. Select a backdrop and then tap scissors again to save.
2. Draw with Emojis. Just select the Pen Icon. Select an Emoji from the slider. Then just draw with your fingers.
3. Use the night camera mode. When using the app in low light, a half moon icon will show up in the upper right corner. When present you can snap good pictures in the dark. Cover the phone with your hand if you are not seeing the moon icon.