Round Corners in the game?

How can I round the corners of the game so that I can make the gaming experience more enjoyable?

Please be more specific about what area of “the game” you are talking about.
Potentially you might be referring to:
Platformer Obstacle Behavior
Pathfinding Obstacle Behavior
The corners of the screen

I’m thinking about the screen border in the game

Here’s what I would do:
Create a new layer called “mask” and put it above the other layers.
Then create a sprite that is essentially a black rectangle with a transparent oval cut out from the center.
Then put that sprite in the “mask” layer and stretch it to be the size of the view port.

Thank You very much!