Magic Music Visuals

I downloaded the trial version. When I open it, the full screen is occupied, with the logo
moving around the screen. I can't find a way to continue, or disengage from full screen mode, or see the work area.
Thanks!
my os is
Mojave- 10.14.5 (18F132)

hardware is:
Model Name: iMac
Model Identifier: iMac17,1
Processor Name: Intel Core i7
Processor Speed: 4 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Hyper-Threading Technology: Enabled
Memory: 32 GB

Cmd-F exits fullscreen mode.

Cmd-Shift-R resets all window positions.

Thanks very much!!

Peter