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I worked it out. You use search a lot. Use that to find the hammer.

For anyone else that's stuck, use the hammer to find the collar. Read it backwards. Think in terms of colours. What's the only one that can be found on the buttons? If it worked on the collar, it'll work on the buttons.

Very devious.

Glad you got there in the end! :) I hope the ending was at least a bit interesting.