Don't know how to make 1 and 2, but #3 looks pretty straightforward.
Simply add Platform behavior to the Japanese teenage schoolgirl sprite, Walrus behavior to Sgt. Tusk, Bird behavior to Clock-a-Doodle, and finally Physics behavior to the cat.
Normally I wouldn't recommend mixing Physics with other behaviors as it can cause weird bugs, but I have a feeling this game will only benefit from it!