Game help and default keys for this device are explained in-game.

Save Frequency < { On Exit | On Change } >
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In Options you can choose to save the rcfile (.gnurobborc) whenever
important settings are changed. You may experience a slight delay
whilst the data is being saved and synced (depending on platform,
backup media type, CPU underclocking etc.) but if you are running GNU
Robbo on a battery powered or generally unstable device then you won't
lose your level progress or your modified settings.


Following is the desktop Linux README which you may find interesting.
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