Some of our Steam players have had this problem and it was solved by doing the following:

Controller and keyboard problems, only a few keys working when a program called "vjoy" is installed, it has compatibility issues with the game's engine, Unity.

- Fixed by uninstalling "vjoy" program from computer.

- We also recommend not using keyboards while a gamepad/controller is connected, it can cause some input issues as well.

thanks for the tip ! :-)