This is not a standalone application, you need Smart Launcher installed on your phone to use this theme.
You can Smart Launcher from here: https://play.google.com/store/apps/details?id=ginlemon.flowerfree

Setting a theme:
1. Go to Preferences
2. Click Theme
3. Select Installed
4. Select Snow Time

If the theme failed, please change the theme to default first, then try it again.

If you have a problem or icon request email me please.