ok, V1.02 is now ready for downloading.
Itch.io page
The changes mainly address fullscreen and tutorial bugs as found above:
lots of minor bugfixes
added the current location of the rings to the grid display
fullscreen mode is now standardised across Windows/Linux platforms with correct resizing and saving.
Tutorial mode has been fixed – there were bugs that caused constant ship explosions.
Tutorial mode text has been changed to make it obvious which keys do what and how rings/horns operate
Tutorial mode bug fix to prevent ‘next’ tip/help from not advancing
Internal key scanning code changed to make it work the same across platforms
land height detection modified to prevent the ship from exploding when close but not actually hit.
difficulty slightly changed so that easy and medium give a little more fuel to make it not quite as brutal