I agree with Ur pont of view about evolution and playing humans if we are humans; it's an interesting notion. However morality is a constant component in all decisions and is a large part of religion, although religious morality is based around the concepts of each religion.
And yes, becoming a god is highly improbable it was a discussionary concept for the possibility. The idea that would become gods is merely based on the perception of the qualities of a god; either to the extent mythological ideals or simply a more evolved race of human.

Ok, thinking biologically we are a sack of cells and bacteria. Mashed up with a few chemicals and hormones and different components. Yes, we all have a brain and thoughts, but it's a phenomenon how the conscious is to be. Subconscious is almost mechanical and reflex, with only a small percentage personalised to the owners 'mind and personality', creating the autopilot reflex. But how does the conscious mind create the thoughts? It's the same chemicals, same messages and components being sent round the nervous system and in the very basics we have the same neurological components and chemicals but in different dosages and different wirings- creating the differenr reactions and illnesses in some cases and personalities. But how? How does the mind create a voice in your head only you can hear, and in some people (such as schitsophrenic) multiple voices with multiple personalities. It's the same components, same pathways but different effect. Einstein said insanity is doing the same thing over and over, but expecting the same result. But did we manage to override that principle? Or did something else change?

Ok, if we were to actually become gods in the future- which however seems highly improbable, for the argument I'll be optimistic- would we really be PLAYING god by cloning animals if, in fact, we were evolving to become gods. Wouldn't we just simply be involving into our future? And if we were to become the gods, then what happens to the ones we were supposedly playing or did they not exist in the first place?
Or perhaps is the human ego to blame for such, possibly immoral, experiments and then therefore the impatience to evolve technologically. If we didn't evolve technologically now, then it would be millions of years until biologically we would evolve and so the human race would be at a crossroads; whether to force evolution technologically or wait for a biological advancement over time. And even if we did advance, how could we become gods if we only advanced in one way: biologically or technologically. And perhaps even to become gods, if it was a religious god then we would need to advance spiritually as well.
So, could we really be playing at something we are beginning to become- if we could in fact- or just testing out using technology before our time caused by ego and impatience to evolve; arguably much like a child teething on a toy because they refuse to wait till they have teeth.