Open a new image about 150 x 150

Use #808080 for the body, Black for the eyes and nose, and #4E6882 for the shirt

Use the paintbrush with these settings and make the mouse

fill the mouse with #C0C0C0

fill the shirt with #94AABE

select the shirt (not the sleeves) and use this cutout

select the sleeves and use the same cutout changing the blur to 2.00

select the head and use this cutout

do not deselect

use the paintbrush with these settings

and change your color to #DF8989 and make two cheeks, then deselect.

now select the left ear and use the same cutout, do not deselect and grab the paintbrush with the same settings, changing your brush size to 10, and use the same color here.

and repeat that for the other ear

select the body and use the same cutout

select the left leg and use the same cutout, changing the blur to 3.00

select the right leg and use the same cutout

your mouse is finished :o)