Scientific Thinking Notebook Games Error

I was trying to run the _Scientific Thinking_ Notebook games, and I got this error for all the games in the cells:
`TypeError: the argument to ascii_art_to_uint8_nparray must be a list (or tuple) of strings containing the same number of strictly-ASCII characters. (original error from numpy: arrays to stack must be passed as a "sequence" type such as list or tuple.)`

I had already run the setup cell and it had run properly.

Below is a screenshot of the error and the code:

The error is generated at line 6:
`game_keeper = GameKeeper(game_type, level)`
At first glance with minimal debugging, it seems like it may be an issue with pycolab, but I am not entirely sure, so I thought to open this issue.