Shape Type
Shape Type is a game designed to help programmers learn about design principles, specifically related to typography. In the game, you use your mouse to manipulate the shapes of letters to match a target design.
The Bézier Game
It seems you're interested in a different game called The Bézier Game, which focuses on mastering the Bézier curve tool used in design software! That's a great choice for learning an important skill in graphic design.
It's Centred That | Test Your Designer Eye
That's right! It sounds like you're looking for the game called It's Centred That. It's a great way to test your eye for design by judging whether dots are truly centered within various shapes.
Pixel Game: A Pixels Test to Quiz Your Knowledge | Pixactly
Based on your description, "Pixel Game: A Pixels Test to Quiz Your Knowledge | Pixactly" seems to refer to a game called Pixactly.