What are the limitations if any of the code playground as far as compiling/running more advanced code? Any topics that cant be

Answer 1

Code playground does not handle multiple inputs or repeated inputs from a loop well. all input has to be entered up front

Answer 2

code playground us not able to import all packages, example is Numpy for Python

Answer 3

Your code MUST execute in under (about) 5 seconds (from crude testing)