The Trio of Trouble animated prologue is animated beautifully, along with demonstrating how Fang the Hunter can be pretty solid in combat, briefly putting Team Sonic on the backfoot (albeit in his dream), and tying up the giant snake they find in the ruins with his wits and teamwork with Trip.
The fact that, for the first time in the series, Sonic, Tails, Knuckles and Amy can all adventure together via the co-op multiplayer is a sight to behold.
After beating the story mode for the first time, you can play as Trip in both the normal levels and her own story mode. You can also have her and Amy fight alongside each other in the co-op multiplayer mode, with Amy being the one that helped kickstart her Heel–Face Turn away from Eggman and Fang in the first place.
In Amy's cutscene, Amy sees Sonic and Tails in the tornado and runs after them, meaning that not only did she run to the island, she kept up with a plane.
Golden Capital Act 2. Sonic, Tails, Knuckles, and/or Amy are able to beat Fang even after he stole the Chaos Emeralds from them. Fang takes out his anger on Trip, who snaps and uses the Emeralds to go Super. What does Super Trip look like? A big freakin' dragon!
Tails building his own Egg-Mobiles for his friends to ride in is pretty awesome, especially when he's doing it on the freezing parts of the island itself.
The final fight doubles as recursive Adaptational Badass moment for Fang. In past comic book adaptations written by Ian Flynn, Fang has a bit of a running gag of grudge matches with the female cast (which he ends up retaining in Superstars with Trip). While this pretty much always lent to one Curbstomp Battle after another in the comics (to the point of Fang even lampshading his competence downgrade compared to facing Sonic), Fang's revenge showdown with Trip pushes her to her limit in a legitimately intense final boss battle where Trip is no longer afraid of the jerboa.
The Great Dark Dragon. Not only is it a great change of pace compared to Fang's giant mech, but it's chronologically the first final boss that Super Sonic can't beat by himself, requiring the help of Trip, who went through a game's worth of character development, to save the day.