<s>
Jumping	B-Application
Jack	I-Application
is	O
a	O
platform	O
game	O
designed	O
by	O
Albert	O
Ball	O
,	O
with	O
art	O
by	O
Stuart	O
C	O
.	O
Ball	O
,	O
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
published	O
by	O
Imagine	O
Software	O
in	O
1983	O
.	O
</s>
<s>
It	O
was	O
available	O
for	O
the	O
Atari	B-Device
8-bit	I-Device
family	I-Device
and	O
Dragon	B-Device
32	I-Device
under	O
the	O
name	O
Leggit	B-Application
!	I-Application
.	O
</s>
<s>
Completing	O
a	O
level	O
reveals	O
a	O
verse	O
from	O
the	O
"	O
Ballad	O
of	O
Jumping	B-Application
Jack	I-Application
"	O
;	O
the	O
next	O
level	O
features	O
an	O
extra	O
hole	O
at	O
the	O
start	O
and	O
from	O
the	O
second	O
level	O
onward	O
,	O
monsters	O
appear	O
which	O
stun	O
Jack	O
in	O
the	O
same	O
way	O
as	O
a	O
fall	O
or	O
mistimed	O
jump	O
.	O
</s>
