Developer console integration.
You can register your own functions with their parameters(of string type, of course, or using console references(array of objects, need to have collider)).
Now just one object by LAlt+Left Click on object when console is opened.
Use it to debug your game in runtime.
And maybe some other...
Code included.
Console already has some registered functions for sample and basic functions.
Messages, that contains "Success", it shows with green color,
With "Error", "Fail" - red.
Other messages have yellow color
Use 'help i' to get instrucions for use.
Console remembers last commands - just use 'Up Arrow' or 'Down Arrow' to navigate between them.