EINSTEIN's head
The line just above EINSTEIN's head contains a transparent pixel (shown in green) that should be blank:
To make the pixel blank:
Also, when EINSTEIN is lying down, the line above his head is entirely blank:
To make the line transparent:
BOY WANDER's head
When BOY WANDER is sitting on the floor, there is a blank line above his head:
To make the line transparent:
MR CREAK's ear
MR CREAK's ear is transparent when he's midstride, which means it will appear filled in or blank depending on the background:
To make the ear always blank:
MR CREAK's hand
There is a blank pixel in MR CREAK's walking stick hand when he has his other arm raised (below, right), but the corresponding pixel is filled in when he is standing or walking (below, left). This difference is most noticeable when MR CREAK is wiping or writing on a blackboard.
To fill in the blank pixel:
MR WACKER's trousers
There are two transparent pixels in the crutch of MR WACKER's trousers:
To make these pixels blank:
MR WITHIT's and ALBERT's shoes
There are blank pixels near MR WITHIT's and ALBERT's shoes that should be transparent:
To make these pixels transparent:
MR WITHIT's and MISS TAKE's hand
There are two blank pixels poking out of MR WITHIT's and MISS TAKE's hand:
To make these pixels transparent:
MR ROCKITT's coat
There are slight differences between MR ROCKITT's coat when he is standing or walking (below, left) and when his arm is raised (below, right). The differences are most noticeable when he is wiping or writing on a blackboard.
To remove these differences:
ALBERT's waist
There is an extraneous blank pixel near ALBERT's waist:
To make the pixel transparent:
ALBERT's head
There are two extraneous blank pixels at the back of ALBERT's head, one at the top and one at the bottom:
To make these pixels transparent:
ALBERT's armpit
There is a transparent pixel that should be blank near ALBERT's armpit when his arm is raised:
To make the pixel blank:
Boys' hands
The mask around the boys' hands in phase 2 of their walking animation (the right hands in the images below) contains an extraneous blank pixel that looks amiss in the little boy's sprite (rightmost image):
The corresponding pixel is transparent in phases 1 (shown below), 3 and 4:
To make the extraneous blank pixel transparent:
Girls' shoes
In phase 1 of HAYLEY's and the little girls' walking animations, and also in HAYLEY's hitting sprite, the tip of the shoe is filled in, as shown in these unmasked graphics:
But the mask erases the tip of the shoe, and does not blank out the pixel behind the shoe:
To fix the mask:
Also, in phase 4 of HAYLEY's and the little girls' walking animations, there is an extraneous blank pixel near the back foot that should be transparent:
To make this blank pixel transparent:
Boys' shoes
In phase 2 of the boys' walking animations, the shoes are filled in, as shown in these unmasked graphics:
But the mask erases the body of the shoe:
To fix the masks:
Score box
The base of the 'o' in the word 'Score' in the score box is shifted one pixel to the left:
To shift it one pixel to the right: