Maybe I'm oversimplifying things here, but why not just create rat, cat, man or woman directly?

first set random animation, then set random frame?

or if random is too random, use choose animation.

on spawn - set objectnew bullet speed - objectold.bullet.speed ?

The easiest way would be something like this:

create 2 global variables:

levelsunlocked - set to 1

levelscore - set to 0

on object 1 clicked - system add 10 to levelscore

on object 2 clicked - system subtract 10 from levelscore

levelscore > 0

levelscore = 300 - system add 1 to levelsunlocked

system trigger once while true

Wow, bumping your thread after only 33 minutes, that might be a record!!

Maybe you could use the expression clamp?

clamp(x, lower, upper)

Return lower if x is less than lower, upper if x is greater than upper, else return x.

Unfortunately the example capx of the drag and throw effect (as found in the FAQ) seems to be unavailable at the time, but making that effect is entirely possible.

Instead of drag and drop could you just apply a force in the direction of mouse.x,mouse.y based on the distance the mouse travels?

There's the option to set physics disabled, or temporarily immovable while dragging, then there are many options to set friction, density, etcetera.

I don't see what gravity per object would add to all the functionality already present.

Couldn't you just use while dragging set physics disabled?

Couldn't you use the timer behaviour instead of the wait action?

It sounds like you are using platform behaviour and physics at the same time, it would be better not to do that.

You are not picking the bat that belongs to the enemyba.

The easiest way is to create a container. That way only the bat attached to the enemyba is selected.

An other choice would be to add a condition - if enemybat is over enemyba. that way only the overlapping bat would be chosen.