How do I put physics in a platformer?

the title. i'm trying to put a physics object into my platformer, i put down a crate and gave it the physics behavior, but when i start the game it's gone. would love any help!

Please read this thread:

construct.net/en/forum/construct-3/how-do-i-8/best-help-tips-forum-139528

Your post doesn't give enough information for us to really know what issue you are having. So those of us who would like to help you have to make some assumptions.

This is what I assume is going on. The box is most likely falling out of the world. Physics objects don't interact with solid objects. Only other physics objects. You need to give the floors/walls the physics behavior (along with the solid behavior) and check their immovable property.

I hope that helps. Good luck with your project.