Show HN: I made a portals physics engine to prove my point

I assume everyone has seen the supposedly portal "paradox" where a blue portal comes smashing down on a cube and people argue if it shoots out the orange portal or not.

Well, I built a simulation with a set of scenarios to look at, each introducing a new concept, slowly building up to the conclusion. In the end, everyone should hopefully be convinced that only one solution makes sense.

I am more than happy to collect feedback and suggestions. Are the explanations clear? Is the pace good or should I spend more time on a specific concept? Do you have other scenarios in mind that are worth showing?