Cute~ That's one prank I'd LOVE to fall for! X3

For critique, I think the limbs should be a little higher up and somewhat larger, and just a little wider. Also, the paw is not rounded in the back past the leg- it's a pretty smooth transition from leg to paw. If you want the sort of gradient I got on my picture, it's not actually that hard- use the fuzzy brush with red color on a middling opacity right down the middle where it changes from red to white. Then use the eyedropper tool (which is right on the d-pad by default, I think?) to select the color to the left or right of your initial stroke and repeat. If you think it's transitioning unevenly or too quickly, it's always okay to add a splash of red or white back in and re-establish the smooth gradient. You can also use a similar process for shading, actually~ (Hint hint wink wink shade shade)

Finally... it's okay to inflate the tail, too :P