Bugs and cheats listed below can be replicated on a device without the need of cheat tools.
Reload cheat - The game never forces your default save file to "auto-save". This can be exploited by saving your game, doing something, storing the information, exiting the game (going to title screen), and then loading the game before you did anything. This can be done with:
Remodeling conditions - You can unlock them by paying medals, writing them down, and then restart the game to restore your medals.
Instructors / Magic Words - You can make an ally an instructor, send yourself the "magic words", and then restart the game to restore your ally.
Structures may display the "Remodel" banner before your island assistant alerts you that they have met the requirements for remodeling. They cannot actually be remodeled until the assistant delivers the message.
If you go to the instructor's list and select an instructor on the bottom row, the resulting menu will appear "under" the text at the bottom of the window.
Placing an Ally Home on a beach tile then transferring the Ally Home to another tile converts the beach tile permanently to an Earth tile afterwards
After smashing a star rock in caves and encountering an enemy like Sally Prin, Kairobot or UFO, the rock sometimes gets stuck on screen and stays there during the whole battle.
You can have an ad-free game, if you turn your WiFi connection off before starting the game. On the other hand, your ranking will not be checked then.
If you equipped the Water Tome to an ally, it will equip Fountain Blast instead of Water Cannon. This bug makes the Tidal Tome useless as the Tidal Tome also equips Fountain Blast.
Occasionally on Samsung's Galaxy S3 and Galaxy Note 3, after turning the phone display off while leaving the game running, the game may load with a black screen, making it impossible to see what is going on. The game will still accept user inputs, so it is possible to save the game, provided one knows where to tap. This black-out can sometimes be solved by turning the display off and back on again, but may take several tries.
Sometime after you research the cooking set and a resident sits down to have a meal (either because they don't have a home yet or they were building something and ran out of strength) when you tap on him/her a very big picture of him/her eating with a black background will appear for a short amount of time.
Using a wagon with 6 allies, you can get full xp for all 6 allies by swapping your first 3 allies after the first round of the fight. This can be used to easily train worse allies by having your worst 3 allies in the wagon out first, and then swapping them with stronger ones after the first round.
[bug] - Water Tome promises to teach "Water Cannon" but instead teaches "Fountain Blast". See images in the gallery.
Whenever you encounter a water beast on your way to an island, killing it gives you a loot bag but you don't receive the items, even after you've reached the island.
Sometimes if you build a structure and move it immediately before being built, the structures effect will stay without it being around.