ocular rewritten

I am trying to design a portal for my platformer game. My platformer game has very simple graphics, so I want to make it simplistic, but I don't have very many ideas on what it should look like. Here's my game: game

picture this: you can make it round and put the generators to activate it on the left of it (it has a very thick border) and with enough power in the center can be the actual portal itself

maybe it could look like an arch that glows