some modifications

ouch, i was busy tomorrow and forgot to include description:
F1-F5 - choose music, F6-F8 - start game

Should the music play during gameplay? Because it doesn't currently. It plays only at the title screen. Or is it as it supposed to be?
The controls are still somewhat too sensitive - maybe add some initial delay to the "repeat"?
 
Also how many levels are there (playing it at the moment - gets a little trickier later... but still no end on the horizon )?
Apart from the ingame music to make it somewhat more "lively" maybe add some palette animation for the cursor or the playfield?
I don't know the original game that it's based on but maybe also add a move counter or timer for some more "challenge".

Original game have 9999 levels. Yes. 9999.

then I would also propose addidng a savegame feature...
EDIT: ...or at least some password based level selection

then I would also propose addidng a savegame feature...
EDIT: ...or at least some password based level selection

here is temporary little key N - Next level. I haven't idea, how to link levels with passwords.

Should the music play during gameplay? Because it doesn't currently. It plays only at the title screen. Or is it as it supposed to be?
The controls are still somewhat too sensitive - maybe add some initial delay to the "repeat"?
 
Also how many levels are there (playing it at the moment - gets a little trickier later... but still no end on the horizon )?
Apart from the ingame music to make it somewhat more "lively" maybe add some palette animation for the cursor or the playfield?
I don't know the original game that it's based on but maybe also add a move counter or timer for some more "challenge".

no, music stops before game( cpu load)