Based on the (unexpected, honestly!) popular demand, we've gone and implemented mouselook and keyboard support. This is now available as an alternative launch option through Steam.
The caveat here is that, since controller support is still considered the default option, when selecting the M/KB launch option you will need to disconnect your controller before booting the game.
This change was implemented in order to allow folks having a hard time with the traditional controls a wider array of options, and to allow for players that utilize assistive technologies which may hinge upon mouse support to do so unencumbered. We still recommend traditional gamepad controls as the intended way to play the game, however we're happy to offer this alternative to everyone.
The feedback to this change has been positive from all the players who were kind enough to test it for us, and as we prep for launch we hope this will help Rogue Flight find its audience!