Cute kitty = 5 stars.
In all honestly though this game looks fantastic. The pixel font, the colour palette, the environment and of course, everyone's favourite little kitty. It's just kind of like a piece of art in its own right. The concept is cool and nails the theme.
I suck at platformers so maybe this game isn't quite for me (not a negative on your part) however, I'd suggest looking at making the movement feel a bit more natural or easier to control - not sure on best describing that... I just felt that there was something about the movement that didn't quite feel right but no idea what it is specifically - could be the gravity or control while in the air, not sure.
But overall, this game was awesome and a great entry. Your art is incredible and I want to buy a poster of it! Well done.