Like most apps of this nature, the secret feature is accessible through a series of strategically-placed taps. Once you’ve downloaded Slider Puzzle, and launched it, tap the Settings icon (a circled ‘i’) in the bottom righthand corner.
After you install the app on your iPhone, open the settings menu, locate the ‘Count Moves’ text in the top lefthand corner and tap it 5 times. If it’s not working, try tapping directly on the word ‘Count.’ If done correctly, the hidden ‘Ready Player One’ link will appear.
By doing this step you will be able to launch the emulator. Here you’ll see all of the ROMs you’ve added via iTools or any other iOS file explorer. We can’t recommend places to download these things, as we don’t condone piracy, but they’re fairly easy to find.