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This is a problem that can happen almost randomly to any kind of Mac app. It has something to do with the Mac App Store downloading an update to an app. Here's how you can normally fix this issue. Delete and re-install the game as explained below. Your purchases/progress should not be lost if you delete the app in the way mentioned below:

1.) Within the Launchpad app on your Mac (it looks like a rocket ship), click and hold on the game's app icon until it starts to shake, then click the 'X' icon that appears above it to delete it properly. Do not drag the app to the Trash or delete it by any other methods.

2.) Reboot your Mac.

3.) Open the "App Store" app, then switch to the "Purchases" tab (or click on your account there, and go to purchases/history) and click the "Install" button next to the game to re-install it.

4.) Now start up the game, wait 30 seconds, then see if it works properly now.

If it still doesn't work, please contact us!

This is a problem that can happen almost randomly to any kind of Mac app. It has something to do with the Mac App Store corrupting a file when it is downloading updates to an app. Here's how you can normally fix this issue:

1.) Log out of the Mac App Store: Open the "App Store" app and from the App Store's menu bar, choose "Store > Sign Out".

2.) Reboot your Mac.

3.) Open the "App Store" again and log back in to the App Store (Store > Sign In). Now start up the game to see if it works.

If it still doesn't work, try to delete and re-install the game as explained below. Your purchases/progress should not be lost if you delete the app in the way mentioned below:

1.) Within the Launchpad app on your Mac (it looks like a rocket ship), click and hold on the game's app icon until it starts to shake, then click the 'X' icon that appears above it to delete it properly. Do not drag the app to the Trash or delete it by any other methods.

2.) Log out of the Mac App Store: Open the "App Store" app and from the App Store's menu bar, choose "Store > Sign Out".

3.) Reboot your Mac.

4.) Open the "App Store" again and log back in to the App Store (Store > Sign In), then switch to the "Purchases" tab and click the "Install" button next to the game to re-install it.

5.) Now start up the game, restore any purchases from the Options/Upgrade screen, then exit the game, and re-start the game, to see if it works properly now.

If it still doesn't work, please contact us!

If one of our games is crashing/freezing, it sounds silly but actually turning off and re-starting your phone/tablet/computer will usually fix this, as it's probably due to your device temporarily being out of memory.

Worst case scenario, you could try to delete the game and re-download it. If it still doesn't work, please contact us!

Make sure you have the newest version of our games. On the 'Options' screen, you can create a 'Kristanix save account', which allows you to backup and synchronize your stats/purchases between all of your devices. Create the account, and use the password you receive to login on your other devices. See our Kristanix Accounts page for more details.

Note: In-progress puzzles are currently not yet synchronized, but everything else is.

First, make sure that you have the newest version of the game that is available on the App Store.

On Android devices (Google, Samsung, Amazon, Kindle etc.), if you use the same Google/Amazon account as when you bought the purchases, your purchases are normally restored automatically, but it can sometimes take a little time. To force it to update faster, power off your device completely, by holding down the power button for a few seconds and turning it off, then turning it back on. Then open up the App Store app, to make sure it's up and running. Now start up the game again and wait 30 seconds, and hopefully it will have automatically restored your purchases.

On Apple devices (iPhone, iPad, Mac), you can restore your purchases automatically from within the game if you are using the same account you purchased it on. Please do this:

Start the game, and open the "Options" or "Upgrade" screen, then tap on the "Restore purchases" button. Depending on your device, it might ask you to login to your account. Afterwards, it should hopefully find your purchases and restore it.

If it doesn't work, please try what we mention in the "Purchase/restore fails" question. If that also fails, don't worry! We have a backup system for giving you back your purchases. Just contact us and let us know which items you have purchased. We can then help you get it back.

First, make sure that you have the newest version of the game that is available on the App Store, to see if it still happens with the newest version.

Often temporary problems with the App Store can cause issues when purchasing/restoring. Please try the following:

1.) If you don't have an iPhone/iPad/Mac, go to step 2.

If you do, try to sign out and in of your App Store account. On iPhone/iPad/Mac, open up the "Settings" app and find "iTunes & App Store". Tap on your email there, and choose "Sign out", then sign back in again.

2.) Power off your device completely, by holding down the power button for a few seconds and turning it off, then turning it back on.

3.) When it's back on, open up the App Store, just to be sure it's up and running, and that it doesn't ask you to login/confirm something. Then press the "Home" button and open up the game again and try to purchase/restore.

When purchasing, sometimes the following can cause issues as well: Expired credit card, not enough funds on gift card (or gift card does not allow In-App-Purchases), or In-App-Purchases are restricted/disabled on the "Settings" app.

If it still doesn't work, please contact us and let us know what you tried to purchase/restore.

That's great to hear you want more! We are continuously updating our games, and we try to add more puzzles and boards to our games every 1-2 months. Make sure that you are updated to the newest version of the game on the App Store in order to get the newest puzzles.

Also, many people like to use the "Reset puzzles" button on the "Options" screen in our games. This will reset all the puzzles so that you can play them again and get 3 new stars on them all. You keep your total amount of stars/points, so this allows you to get even more stars/points.

Use the "Scatter" feature to reveal all incorrectly placed pieces. Tap on the white icon in the top-right corner to show the menu, then tap on "Scatter".

The pieces are not missing or extra. Most likely other pieces are placed incorrectly, or they can be hard to find when they are lying on top of other pieces. In some cases it might be that you are trying to move a piece that is already locked on the correct position.

Also, it might be that the background has similar colors to the puzzle itself, making it look like there's a piece already placed there. Try to switch to another background on the "Options" screen in that case.

Here's how you can turn on/off piece rotation, and how you can change the amount of jigsaw pieces you are playing with:

1.) Start up Jigsaw Puzzles Epic, and on the main menu, tap on "Puzzles", then tap on the pack & puzzle you want to play.

2.) It will then show the puzzle setup screen. You can turn on/off piece rotation there, and set "Number of pieces" to the amount you want, then tap on "Play" to play the puzzle.

Note: Any puzzle you have already started have to be re-started if you want to play it with the new settings.

Deleting a puzzle pack will free up disk space. Here's how you can delete/hide a puzzle pack in Jigsaw Puzzles Epic:

1.) Start up Jigsaw Puzzles Epic, and on the main menu, tap on "Puzzles", then scroll down to the bottom and tap on "Edit".

2.) Tap on the packs you want to delete/hide. They will then be marked as "Hidden". Then tap on "Back" to confirm it. They are then deleted from your device and disk space freed up.

Note: If you ever want to show/play the puzzle pack again, just tap on "Edit" and tap on the pack again to re-show it.

All of the puzzles are 100% logically solvable with 1 unique solution. You have most likely inserted a wrong number somewhere. If you use the "Highlight invalid numbers" option on the "Options" screen, you can see which numbers are incorrectly placed.

Note: If you are playing Killer Sudoku, remember that you have to solve the math (Killer) part of the puzzle. You can't only solve the Sudoku part, the math part has to be correct as well.