I would recomend you to add colors to your code and please make little bit bigger stops :D
All in all i really like your code :D congrats bro ;)
If you type the wrong answer in the multiply task you are stuck in an endless loop of 'Incorrect. Please try again." A simple indentation error on line 44
There are a few issues with this game. First of all when the computer asks the commands and I put something random it just continues as if I did nothing. Secondly when you ask the math question and by accident I typed a string, the whole code crashed. You need to account for these human errors otherwise your code will always crash when random people are testing it out. To be an accurate and a detailed programer you need to pay attention to the finer details and make sure your game tends to everyone.