you can make halloween effects for example while using trickster leaving behind a trail of skulls masked by smoke or for firebird/freeze making it so the effect isnt just a colour but skulls coming out/something like that

Why were coinboxes removed

How long does it take to make an event and how do you keep old file data as it can be used to benefit the game now, for example a Prehistoric event game mode which allows old physics with old gameplay with the old M1 M2 M3 skins.