Actually a really good Sonic side story, and for free at that and the best kind of April Fool's Day Joke: One that is actually really good on its own regardless of what day of the year it is.

The Sonic cast's personality shines through with wonderful illustrations and captivating cartoony backgrounds. Your thoughts on everything you inspect are great. There's a minigame you play for your thoughts. It's the same every time but it evolves as you progress through the train cars so it always stays fresh. Even if you solving the minigame leads to Tails presenting the solution and you provide the reasoning after gives a little disconnect, it's still fun to connect the dots.

The mystery is well written, with little drips given to you here or there, that when things finally connect you go ooohhhhh yeah that makes sense!

It's a few hours and absolutely free, I think for any Sonic fan ro even looking for a simple little mystery while also knowing who Sonic is, it's a must.