At one point in The Plucky Squire, you'll come across a creature named Topsy. Topsy has a key you need to progress, but in order to get it from him, you'll need to Here's how to solve the puzzle and get Topsy's biscuits back to him.
How To Get Topsy's Biscuits
In Topsy's area, you'll see some text that reads: "Here was a secluded Forest." To its right, you'll see just that - a forest, with Topsy's biscuits at the back right. To its left and just underneath Topsy, you'll see a patch of dirt with some coloured spots in it.
If you go back in the forest and try to interact with the biscuits, you'll find that you can pull them - but the bridges are too narrow for you to get the biscuits back. Bring the biscuits onto the first patch of dirt with colored spots on it that looks just like the one beneath Topsy.
Head back to the beginning of the puzzle where Topsy is sitting. You'll find that you can hit the bottom word of the text with your sword. Pick up the word Forest and move it away from the puzzle. Move the word Ruin over from the right side and fill in the spot that 'Forest' took up before, so the text reads "Here was a secluded Ruin."
Now, you'll see a totally new environment - but you aren't done quite yet. The biscuits are closer, and past the wall that was blocking them in the Forest - but you'll need to move them one more time now that you're in the Ruin mode, onto the third spot that looks like the one underneath Topsy.
Then, switch back to the forest and finally drag the biscuits back to Topsy to complete this section. Underneath him is a key, letting you progress through the door just ahead.