Sonic Dream Team offers multiple different ways to customize your controls including the option to use a dynamic thumbstick - one that appears wherever you place your thumb; multiple sensitivity settings; different control schemes; and even the option to place each button exactly where you want it on screen.
You can find all these options under Controls in the Settings menu - we strongly recommend experimenting with different settings to see what works best for you.
The game also lets you customize the game's camera: options to change camera sensitivity, its distance from your character, the way it's controlled, and more can all be found by select Camera from the Settings menu.