Currently, LF2 does work as a typical projector via an HDMI connection, however, the main functionality of the LF2 is projection mapping.
The LF2/2+ Remote is Required
As of the 2.1.15 Lightform Creator release, your remote is required to use HDMI as a source. Plugging in the HDMI will not automatically switch the source. You must trigger the input to switch using your remote.
With the latest firmware release, you can use your remote to open a new projector menu, now with basic keystone correction, projection modes, and more.
Update the projection mode by clicking on "Picture" in the projector menu" or by going to the control page in Lightform Creator to change the projector mode (front, rear, etc.) to invert the image accordingly. See here:
You can see the full specs here https://lightform.com/lf2#specs.