+ AY music has been implemented in the menu (converted from the C64 version, plays in 128k mode)
+ Kempston joystick controls added
+ Keys remapped: QAOP+Space, H - pause
+ Pause mode fixed
+ Skip levels by pressing Symb+N
+ Additional frame at the bottom of the screen instead of a blank space
+ Flying star (enemy) sprite mask has been corrected - now without the stripe on the right
+ Fire (weapon) sprite has been corrected - removed an incorrect pixel
+ Brightness has been enabled - as the game's window and as the part of info frame
+ A few cosmetic changes: centering messages, editing attributes near the timer, redesigning the menu
+ Russian instructions