TinyFlux is a branch of PCFluxboxOS, which itself is a remaster of PCLinuxOS. As you might be able to gather from the name, PCFluxboxOS uses the Fluxbox desktop environment, which is quite different.
In addition to TinyFlux, there is "MidiFlux", which is basically the same except with a wider application selection by default. TinyFlux is a final release, MidiFlux is still in beta.

Even though this is actually the shutdown splash, the startup splash is visually similar.

This little wizard appears when starting from the live CD, and gathers basic system settings.

Installing TinyFlux, which unfortunately I could not get to work correctly.

This is the login screen.

This is the default desktop.
There are no icons, no menus, no nothings anywhere. There is a bar at the bottom of the screen that contains a workplace switcher, a taskbar, and an icon area. That's it.
The whole purpose of this is to save desktop space. Many other windowing systems also do something similar. In reality, Fluxbox is nothing more than a window manager, not a true desktop environment.