How do I use Physics with a Gravity Flip?

Currently our main character goes through a gravity flip (using the platform control) and as such she ends up on the ceiling.

However there are physics objects in the game that I'd like to affect through gravity as well.

I've looked into setting the World Gravity, but can not find this anywhere within the event creation process. Can someone point me in the right direction?

I dont think you can with the official Physics.

You can with chipmunk.

Thank you so very much for this ...

Could you advise the way to install it. I have followed the usual guide but can not choose chipmunk as the physics engine.

https://www.scirra.com/manual/158/third-party-addons

It is a behaviour. Attach it to an object the same way as any other behaviour.

Yes that means a lot of re-coding. Got to change every line using physics to use chipmunk in stead.

The other option is to set world gravity to zero and make you own gravity by applying physics forces/impulses.

Of course! My apologies for being dumb!

You can set world gravity in Box2D physics:

It is in the physics global settings.

^^^^ Forgot that can be a negative value.