Courtesy of Dave Lodge

Twinworld saved game file format
================================

offset          use
--------------------------------
?0              Level
?1              Parachutes
?2              Springs
?3              Ball Enlargers
?4              Red
?5              Green
?6              Blue
!7              Score
?11             Lives
!12             Amount of shots fired
!16             Hit rate
!20             Times died
?24             *unknown*
?25             Amount of shop calls
!26             Flag to mark Key
!30             Price of Key  
!34             Flag to mark Balls
!38             Price of Balls
!42             Flag to mark Spring
!46             Price of Spring
!50             Flag to mark Extra Life
!54             Price of Extra Life
!58             Flag to mark Parachute
!62             Price of Parachute
!66             Flag to mark Invunerability
!70             Price of Invunerability

In the case of flags in the word <> 0 then the flag is true