Look like slime is hitting the fan...

Incorrect. The correct sentence would be "The closest Noah's ever gotten to running"

Judjing by the amount of green in the 'red' bubble, Id say that the red bubbles are just ripened green bubbles?

I'm assuming there will be blue cats too based on the banner

That conversation on the first panel reminds me of Pinky & the Brain for some reason.

Also, I wonder when we meet the blue and red cats that are teased on the banner.