The player should get info from a statistics button on the GUI, with data such as species numbers, death rate, etc. as well as information about the simulated parts of their own microbe.
There’s been loads of discussion on the CPA system in the past - these threads should be good starting points:
As with everything we’ve talked about, ideas from the early discussions are mostly obsolete now unfortunately. @Seregon and @tjwhale can give you a much better idea of the current concept.