In this version of Galaxus you can't define your own Keyboard setup. There is a problem with the 2-keys-at-same-time-imitation on some machines. It is important to use SHIFT for fire.
If you have a joystick - make a new definition in the control panel of your joystick software.
ARROW KEYS (Driving) & SHIFT (Fire)
P for Pause. "Continue" is then in file menu. (or Command + L)
ESC to abort current mission
Yes, there is a cheat mode. You can activate it by pressing a combination of keys!
Sorry but I can't write it down here -> Galaxus is too easy with the cheat mode!!
If you really have problems with the standard keyboard definition write to develop@algomedia.com and we fix your problem.