I've been running through threads trying to find box physics but most of what I find is physics for circles/balls, it seems.

Anybody have a good lead on a physics engine-like thing for squares that I could try to figure out?

My next game idea involves boxes falling to the ground but they need to pile up (and then the player needs to be able to walk/jump on top of them).

I could have the boxes always land on a flat side but thought it would be cooler if they tumble into place and fill in space likes a box would in the real world. Seems like something doable in P8 but I have zero idea on how to start that from scratch, so I need something to get me started.

I started working on one but it's not very solid yet.

https://www.lexaloffle.com/bbs/?tid=3512 might be a useful starting point.