Cat and Mouse Birthday Card

I'm not sure I like this card all that much but I thought I would share it anyway - maybe someone has a suggestion for how it could be improved. I used a little wooden cat and mouse, which are three-dimensional but flat on one side so you can stick them onto the card, and some cardboard button stickers. I also have a small cat hole punch which I used to punch cat shapes along the bottom of the card. I mounted the cat and mouse on a piece of spotty blue backing paper and added a 'happy birthday' outline. The only problem is that the size of the cat and mouse means this card isn't a standard price to post and counts as a 'large letter'!