Since you are playing
Letters from Nowhere 2 on the iPad, it's all about the tap and swipe. You'll tap to pick up an item, tap and swipe to move items about the screen, and tap to complete puzzles. It's very basic and is perfectly suited for the iPad.
For the trophy hunters out there, you can collect a myriad of trophies and you can view them all in the Trophy Room. Everything from beating levels without using a hint, to completing puzzles without using the skip option, to collecting all of the black cats and stamps is available.
To aid you in your quest, I mentioned Bonus Items earlier. These are items that you can purchase for use in the main game, and while they come at a price, the trick is to get them when you first come to a new area on the Map screen. When you do this, you may have 5 levels to choose from and when you buy a Bonus Item, that item is applied to all incomplete levels on the screen, so you get more bang for your buck. The catch is that you have to work for them, and this means finding them as they are hidden in the levels. When you find the Jack in the Box, you are awarded an extra 15,000 points for that level. Locating and tapping the Camera flashes the screen with white, but reveals the location of six items on the screen. If you can remember where they are or quickly tap to collect them, this is a really great bonus. Finding and clicking the Thermometer will allow you to drag it around the screen and it will flash hot or cold as you either approach or move away from an item. If you are speedy, you can use it to find five items in the short period of time it is available. Finally, locating the Artist's Palette will turn all of the names of the items in your list into pictures so they are easier to find. The reason this Bonus Item isn't available in Unlimited Mode is because the items are already shown as pictures.
If you played the first game, you'll want to see how everything wraps up and Letters from Nowhere 2 is a fun hidden object game for fans of the genre. Unlimited Mode, while not actually "unlimited" does provide you with a lot more gameplay. Since you are ranked depending on how quickly you complete the levels, you can work to try to beat the best time for added gameplay. Definitely check it out if you like hidden object with a dash of puzzles and adventure.