I just finished adding a switch palace to Super Mario World Within Scratch so I wanted to post a quick teaser (it only took me like 10 minutes to make this) ✦✦✦✦✦✦ Arrow keys, WASD, space, or tap to switch screenshots
I used the site BeFunky for the blurred images ✦✦✦✦✦✦ And yes, it does work exactly like it does in the original Super Mario World. You have to take a secret exit in another level by grabbing a key and bringing it to a keyhole elsewhere, which unlocks the palace. There are outlined yellow blocks in some parts of the other levels; hitting the switch turns these solid. Some of these blocks have powerups in them, others cover up gaps in the ground. ✦✦✦✦✦✦ Only two more levels to do and then the game's pretty much done