Use the arrow keys to move. Use Z to jump, and X to use FLUDD. Use Z to jump into the Bianco Hills portal, and to enter the door to the Blue Coin hut. Use X to talk to others. Sorry about the wall detection; it worked perfectly in Scratch 1.4, so I don't know what happened here.
All credit goes to @scratchU8_test @Shaddow2022 for the meme stuff lol