This is for @Superseed16 But anyone can vote if they want to as well. Updated so you can see the bottom sprites.
The memory one has four inputs that will flash on the screen and then you have to put it in that order, get it wrong and you have to retry with it resetting and changing the order. The top two blocks of each option are the locked version and the bottom two of each option are the unlocked version. You can tell if it's locked or not by looking at the center of the block. After all of this, you type in the code into the comments and the answer bar, you can use your arrow keys to look through the ones I have done so far. That is all, thank you!