Transform and Stretch an image in Krita

Make sure that 'Tool Options' is active. If not, to make it active and available, do the following 

Go to Settings, Dockers and select 'Tool Options'

Now you will see the Tool Options available for you to use. 

Here is the image you want to transform. You want to stretch the top part of the image to make it look better. 

Select Transform tool. 

Then click on the layer you want to edit. Now you will see hands appearing on the sides of the image. Now select the 'Perspective tool' from the  'Tool Options'

Stretch the top part of the image by holding the top handles and dragging to the direction you want. 

Now it is done. 

Use the 'Wrap' tool, 'Cage' and 'Mesh' tools to make your image transformation funny.