New this build: collision polygons and global objects!
Collision polygons allow you to make a shape around an object which is the area it collides with. This means objects can collide more realistically than the "bounding box" method before. You can edit collision polygons in the image editor, as shown:
As you can see, you have the option to set the bounding box like it was before (which is faster). You can also get Construct 2 to guess the collision polygon. It can't read your mind so it'll never get it exactly perfect, but it gives you a good starting point to tweak and get the collision polygon you want, which helps save time.
Note existing projects opened in r57 will still use bounding box collisions. You'll need to manually 'guess' or edit the polygons to change it. However, new projects started from r57 will automatically guess polygons for imported images.
Be careful with collision polygons - if you add too many points it can make the game run slowly! Construct 2 warns you if you add more than 8 points, which should be OK for most objects. We've also updated the Space Blaster demo to use collision polygons, which actually improves the gameplay (no getting hit on your spaceship's bounding box corner!)
Global objects are pretty straightforward. They simply don't get destroyed at the end of the layout, and continue to exist in the next layout. You can make objects global via the properties bar.
That's all for now, more on the way!