It's been a while, but maybe I have a solution:
it seems there is a problem with the game.py in the new code.
Line 1492 in the game.py (probably spaces instead of tabs) https://www.codecademy.com/en/forum_questions/519ab24b8d93808eb80001dc
The installer is correct instead, but it simply downloads a "bugged" game.py.
Anyway I have an older version of the code so maybe you can try this:
Go to C:\P-ROC\games\cactuscanyon
Delete everything except dmd and sound folders
Download the old code
Extract the archive into the cactuscanyon folder.
Try it and let me know.