I decided to take some time to revisit Nimble Cats and tidy it up a little bit. Movement is now a lot more smooth as well as a new camera effect.
I've also completely re-did the internal HUD system, while not much changes on the visual end; everything looks a lot more polished and professional now.
I believe the next step will be adding some more monsters as well as creating new levels.

However, your physics needs a lot of work. For example, colliding with the side of the block (not just the bottom) immediately causes you to lose any upward velocity -- which can make platforming a bit annoying.
Also your gravity physics itself is broken in that it immediately sends your ass going south. Look at how Mario or Sonic handles the jumping, there's a slight lag before their descent in a fall.