Rusty's pounce

EDIT: i made his paws bigger and changed his back legs a little. does it look a little better now? oh and that thing jumping away is a mouse lol

Ok, this is for one of the panels in the next comic page and I'd really like some help with anatomy. I've been tweaking it a lot myself but I'm still not happy with it, please please please comment with any constructive criticism even if you don't leave an official critique! Obviously it's not going to be that critique worthy because it's only a sketch, I'd just like help with the perspective and anatomy here. But please don't be afraid to be cruel to me, I can take it I'd just like to improve this as much as possible. Thank you!