I've played one game of ransom. This is fun but I have some comments/suggestions.

1. Letters are sometimes barely shuffled 2. Sometimes same clue with different redacted words come one after another so you know which words are redacted 3. Sometimes (foreign names for example) the answer is not redacted due to accents. Same for similar words (complexity uncensored for "complex system"). Sometimes picture or video contains answer. 4. I guess you use some popularity metric for articles? I got Greece, ancient Greece and archaic Greece, though the topic is allegedly physics? Maybe filtering a bit more would be better 5. Before I started game I didn't know how long it is supposed to last. Apparently it's indefinite, and I lost on purpose to verify it. 6. Some feeling of progression with harder tasks would also feel nice.