# Physics/Collision

**URL:** <https://forum.kirupa.com/t/physics-collision/317333>\
**Category:** programming\
**Created:** [December 16, 2010, 11:38pm UTC](https://forum.kirupa.com/t/physics-collision/317333 "2010-12-16T23:38:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![RightLegRed](https://avatars.discourse-cdn.com/v4/letter/r/e19adc/32.png) [@RightLegRed](https://forum.kirupa.com/u/RightLegRed)\
**Post date:** [December 16, 2010, 11:38pm UTC](https://forum.kirupa.com/t/physics-collision/317333/1 "2010-12-16T23:38:00Z")

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I’m currently doing a course in which I have to make my own game and present it. I’m using Flash to make my game, but I’ve been having a problem with physics and collisions. I’ve tried to use BOX2D, but every time I save even the pre-made BOX2D demo’s don’t work after being saved. I’ve tried a few other engines too.

Could someone link me to/guide me on how to use collision or physics in Adobe CS4 or CS5 (I have both).

Thanks.