Board Thread:Chinese content/@comment-25646923-20150908112623/@comment-26937062-20150910154426

You can use the infininte puzzle pieces trick. I have an iPhone, so I'm not sure if everything below also applies to Android.

- Infinite puzzle trick

First, put your phone on airplane mode (it will help if the game crashes). Go to one of the daily levels. Pause the game before you kill the first Yeti, Gargantular or Dr. Zomboss, and lock your device. Unlock it, finish the level, but don't click to continue once you're at the reward screen. Instead, force-close the game and reopen it. It should bring you back to the last paused/saved state prior to collecting puzzle pieces. Lock the game before continuing, so it re-saves the pause state. Unlock the game, finishe the level, force-close the app and keep on doing this until you collected the required number of puzzle pieces. Once you're done, hit continue at the reward screen to go back to the map. You may need to force-close the app, enable your internet, then reopen it a couple of times until you see all puzzle pieces add up.

- Crash recovery

If the game crashes as it loads while doing the above trick, there's a way to at least keep the challenge active so you can start it again (you won't lose any collected puzzle pieces). Once the app crashes while loading, try re-opening the app. It should go to the game's title screen. Once at the title screen, you will get a warning that you're not connected to the internet. You can dismiss it, but do NOT tap the "play"  button yet. Instead, disable airplane mode to get the phone to connect to the internet while still at the title screen. Give it a minute or so to ensure it connected. Once the phone is connected to the web, tap to select your profile and/or play the game. You should see the circular loading icon for a bit, the icon will disappear and you'll still be at the title screen. You can do it once more just in case, but the game won't take you to the map. That's what we want. Force-close the app from the title screen, reopen it, and tap the play button again. This time, it should take you to the map. You will be able to replay the same challenge (although the plants might have changed), and you have kept the puzzle pieces acquired thus far.

- New trick to upgrade plants from L1 to L4 with only 50,000 coins

I also noticed something new a few days ago. I haven't seen this mentioned anywhere, so I assume it's a new trick. It works with the latest version of the game on iPhone and allows you to upgrade plants from Level 1 to Level 4 with only 50,000 coins, instead of spending 50k for L2, 100k for L3 and 200k for L4. To do this, first, you need to collect the required puzzle pieces to upgrade from L1 to L4 (130) and have at least 50k in coins to trigger the option to upgrade a plant. Once you're ready to click and confirm the upgrade from L1 to L2, tap the button multiple times in succession as quickly as you can. This will trigger the game to process multiple upgrades in succession, bringing the plant up to level 4. It will use the correct amount of puzzle pieces (130), but you only need a minimum 50k coins. Please note that if you have fewer than 350k in coins (the total amount required to upgrade to L4), it will bring your coin count down to 0.

Hope this all helps.