Cannonball Blitz

The player has to reach the flag on the top. The guard sends the cannonballs
down, so you must jump over them. Cannonballs roll on the floors which have
hatches, that open randomly. Also cannonballs fall on the swings, so you have
to use them for climbing to the upper floor. Finally you must catch the
balloon to make your way up to the flag and to the next level. Moving options
available are up, down, left, right and jump.