As a preface, I will say that this is a bit of a finicky room, but first off, you probably want to note the movement order when trying to solve the room. Whatever steps on the plate has to move before the eyes behind the door. Getting said creature to do that can be *really* frustrating so I'll give you some advice.
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×There are two ways to get the goblin to get on the plate. One might work, and I wasted a lot of time trying and that would be to have a huge pile of roaches trap him along the top so that he moves around to step on the plate. The smart way to do it is to use the fact that the roaches move after the goblin keep him a square to the right of the plate and time it right. I'll leave out how the eyes fit into the second method.
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If you need to think outside of the box, then you didn't build a good enough box.