Question Help getting physics sample projects up and running

Sorry for how mundane this may seem but I've been pulling my hair out trying to get the DOTS physics demos up and running. I've

Tried unity 2019.4.18f1 and 2020.2.2f1
Tried unity physics package 0.4 and 0.6 (via Git URL com.unity.physics on 2020.2 build)
Trying to download the git repo via url (https://github.com/Unity-Technologies/FPSSample.git) fails saying there's no git executable found. So I installed Git for Windows, then it said something like that there was no project file at the root of the git directory (similar to this https://answers.unity.com/questions/1582586/package-manager-using-git-repo.html). So I downloaded the zip of the repo and unzipped it using winzip into a folder and put that folder into the brand new project's Asset folder. It then compiles and spits out a ton of errors. Tracing them back I seem to get to compatibility errors between versions like ScheduleBuildBroadphaseJobs now using a bool rather than int at last argument (which here shows deprecation https://docs.unity3d.com/Packages/c...m_Int32__Unity_Jobs_JobHandle_System_Boolean_ ) so I chalked that up to differences in a too new 0.6 unity.physics build. I rolled back to 2019 and tried unity.phisics 0.4 and now I still get more errors e.g.:

Assets\Sample Projects\EntityComponentSystemSamples-master\UnityPhysicsSamples\Assets\Tests\SamplesTest\SamplesTest.cs(14,27): error CS0246: The type or namespace name 'FixedStepSimulationSystemGroup' could not be found (are you missing a using directive or an assembly reference?)

Assets\Sample Projects\EntityComponentSystemSamples-master\UnityPhysicsSamples\Assets\Tests\SamplesTest\UnityPhysicsEndToEndDeterminismTest.cs(20,27): error CS0246: The type or namespace name 'FixedStepSimulationSystemGroup' could not be found (are you missing a using directive or an assembly reference?)

Assets\Sample Projects\EntityComponentSystemSamples-master\ECSSamples\Assets\HelloCube\2. IJobChunk\RotationSpeedSystem_IJobChunk.cs(27,27): error CS0246: The type or namespace name 'ComponentTypeHandle<>' could not be found (are you missing a using directive or an assembly reference?)

It's been a few years since using Unity for me so I'm imagining the error is somewhere in my project import section. I've been searching for a few hours now and am giving up and posting this question. Thanks for any help!
Cheers,
J

edit: also tried turning on allow unsafe code for player

 

Well, the readme says it all...

...which unfortunately is a common practice in the unity sample projects, demos, assets, etc.

 

Hah! Well, thanks for pointing that out. One would have thought I'd catch that in all of this...

 

Go here.

https://github.com/Unity-Technologies/EntityComponentSystemSamples/tree/master/UnityPhysicsSamples

 

Oh man, so I had pasted in the wrong git repo ... as TheOtherMonarch points out. That, indeed was the repo I was trying (and was the reason I didn't catch any note in the readme that Edy pointed out), though I was using the entire project with the non-physics demos, a level up from the UnityPhysicsSamples. Just now I finally got the physics samples to work and was coming here to say as much. I'm not sure what I did to get it to work, maybe it was only copying the files form the UnityPhysicsSamples folder right into my assets folder and not pasting the entire repo of ECS samples. Now I'm wanting to convert one of these script-made ragdolls into a prefab...

 

This might help setting up your ragdoll in the editor, I talk a little about setting up a Hip Joint in the Unity Now talk.