After a lot of works i've single-filed these games:
Block buster
Circus (italian version)
Crazy climber
Devastator
Puckman (italian version)
Quasimodo 8k
Shifty 8k
Sno-cat (italian version)
U-Boat (italian version)
HERE you may find the d64 image with these games plus other fixed to play from tape to disk.