Felix sighs again before he answers.

"If this is like the other rooms I've been in that look like it, the door won't open until the blocks are on those buttons. We probably need all three at the same time, though I haven't dealt with more than one so I don't know for sure."

Well. Sort of answers. Meanwhile, he's looking back and forth between the two sides of the room, trying to figure out a route that will get his block to a button without dropping it into a pit.