I created a code to make an image composition ...
back=Import["https://i.stack.imgur.com/ouBUD.png"];
img1=Import["https://i.stack.imgur.com/0o8UW.png"];
img2=Import["https://i.stack.imgur.com/uHQWP.png"];
Graphics[{Inset[back,{Center,Center}],Inset[img1,{Left,Bottom}],Inset[img2,{Right,Top}]}]
I tested the dimensions to confirm that this composition is possible:
ImageDimensions[back]
ImageDimensions[img1]
ImageDimensions[img2]
I'm trying to generate the image below:
What is missing from the code so I can get what I want?