Even though it's only been a day since release, we saw an overwhelming response from the community that MOUSE support should be added to Desktop mode.
With the latest update of MIRAGE, you may now navigate using a mouse. Try it out!
Mouse support added to Desktop mode!
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.