To download your images:
0. Ask the person who shared the link with you for the password!
1. Click on the grey button " Select Photos" just above on your right
2. Click on the newly appeared "Download" button
3. Select "Download Gallery." All images will come in 1 zip file.

To download on your phone, open the image and then press the download button at the bottom right. Images have to be downloaded one by one.

Please note that downloaded photos will not be watermarked.