Thanks for the kind feedback - I ve now finished a four level ADF version - this is as large as the game can get on a single ADF - frustratingly there seems an error in the Reality game creator - it should enable you to add 30 - 50 attack waves per level but when you play the game each level seems to use only the first 15 attack waves. Therefore I have 60 attack waves I have designed and added sprites for which are not being run in this version - the only solution is to add three extra levels and use the attack waves in these new additional levels. Due to storage limitation on the ADF this can only happen on a CD (CD32 version) or harddrive version (Amiga 500 and A1200).
Hopefully attached is the latest 4 level version of the game - I also modified the background for the first two levels - (variation on rocks at bottom of level 1 and added clouds for level 2).
If there is enough interest I will try to finish the expanded version by Sept - October.