I scanned the code and was able to alter it far enough with new coding technics found after coding this game and
it made enough room to add hiscore and display of balls remaining (ball on screen included).
Controls are unaltered:
Row Space-V : Start new game
Row A-G : Flipper
Row Q-T : Release new ball.
Downloadlink: EDIT: there was a timing bug, hope it is solved.
This also shows how tight the coding is.
I played several times (without success), because very often the text "TILT" occurs during pressing the "flipper" row....
Pressing the flippers up is also bouncing against the machine. If you do that too long the machine goes on TILT.
You need to use the flippers carefully. Keeping the ball in rest on the flipper will therefore result in TILT also.
Keep the ball moving.