There have been a number of interesting Papers Please riffs in this jam and I think this one has a nice conceit. I like the simplicity of the censoring mechanic; you immediately see how this would be fun to play in a full-length game with more and more complexity, plus the documents are such a great way to communicate story.
Unfortunately there were some issues that made it tough, most notably the scroll wheel--it was really difficult to scroll down incrementally and really easy to scroll the letter all the way off the page. Immediately losing if you make a mistake also seems way too punitive, especially since it doesn't tell you why; I was unclear if I'd missed marking something, marked something I shouldn't, or just not colored in the words thoroughly enough.
But it really is a very strong start and I'd definitely give a more polished version another look.