I am having the most impossible time trying to insert spaces/tabs in Twine. I have tried &emsp but Twine just actually prints "&emsp." Any help is much appreciated
Based on what you've posted here, you've misspelled it. The character entity reference for the EM space is:
 
Note the terminating semi-colon which you've omitted in your example.
If that doesn't resolve your issue, where are you trying to use it? Unfortunately, you cannot insert raw HTML and/or character references just anywhere, so perhaps that is the issue.
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If that doesn't resolve your issue, where are you trying to use it? Unfortunately, you cannot insert raw HTML and/or character references just anywhere, so perhaps that is the issue.