If you are using Phaser, you can use PhysicsEditor (https://www.codeandweb.com/physicseditor https://www.codeandweb.com/physicseditor) with the P2 physics to au

If you are using Phaser, you can use PhysicsEditor (https://www.codeandweb.com/physicseditor https://www.codeandweb.com/physicseditor) with the P2 physics to auto-trace a picture into a polygon and load it into Phaser. It is easy and only takes a few minutes.