Hey thanks for the feedback!
Though, the echos dont inherently collide with each other, they are just being teleported to create the illusion of movement. What is happening though is that when you are playing and you collide with an echo, that collision is recorded in movement so it will just be played back as if that happened again.
What i think you are talking about is when an echo pushes you away and makes you clip through some stuff, and that i would like to fix but thats pretty complex…
Anyway, thanks for bringing it up though, and im glad you like the concept.