I downloaded today's alpha manually and I have two issues with the disk image. These may seem trivial, but the disk image is for many the first experience of Logos software.
1. At first glance it is not clear which of the blue squares is the application icon and which is your logo:

2. It is good practice to provide a shortcut to the Applications folder to assist in the installation of the application. See the example for the Google Chrome browser below:
