By mistake I threw out the replacement heart so I tried to substitute it with the radio since I thought it could work as an artificial heart. I mean, it's working right? It would also give his repaired body some rhythm.
The Obstacle i hate most in this game is the Squares (the 3/4 squares and the symmetrical square obstacle thing), when you get into the 1000+ speeds, they can become unpredictable and can either let you go straight pass without interference, or stop you right there with a difficult sharp turn.
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 "Accelerator"){kind=icon}
The biggest problem is they block your vision, so you can't see what's coming next.