We're currently testing a fix for the game on Steam Deck via a beta branch from 9/Nov to 17/Nov.
If you have a Steam Deck and would like to participate, the details are below.
Right-click on Ray'Z Arcade Chronology from the library page and select "Properties", then select the "BETAS" tab, and enter the password "vercingetorix".
We've checked all 3 titles, but RayCrisis has numerous stages and we need brave pilots to fly into battle!
So, if you notice any issues while playing, please let us know in this thread.