Elements
Questors and your enemies each have an elemental affinity. Magic is stronger than Inorganic, Inorganic is stronger than Organic, and Organic is stronger than Magic. During a level, look for red explosion bubbles with one of the affinities inside. This indicates that one of your Questors is exploiting an elemental weakness of an enemy.
Questors
Place your Questors strategically. For example, you will begin with a knight, archer, and witch. Because the archer and witch are ranged units, place them in off lane positions. Position a knight or other melee Questors near the ranged Questor to hold enemies there so they can be hit with the ranged attacks.
After completing level 5 or 6 you will have access to the Healer Questor. Have her manually target another Questor, and she will heal them from time to time. When a Questor's health drops to zero, they will be temporarily knocked out. They will regenerate slowly over time, but you can use the Healer Questor to get them up faster.
Upgrade your Questors with cubes when possible, especially by level 8 when your enemies are noticeably stronger.
After completing level 11, you will be able to evolve your Questors. This requires two Questors of the same type. Select one and choose "Evolve", then select the other Questor to fuse with. You will be able to preview the result before starting the the evolution. If the questors you are fusing are upgraded, the final evolved form will have higher stats than usual. Thus, it is best to fully upgrade your Questors to level 5 before you evolve them.
Quobelisks
Quobelisks are small colored blocks that appear in the off-lane areas of a levels. They vary in color and have small black dots on them. The number of dots is equal to the number of enemies that must be defeated near the Quobelisk for it to activate, and give the following effects.
Blue Quobelisks
Open new Questor placement spots or block an enemy route.
Red Quobelisks
Work against you by opening up new shortcuts for your enemies; Avoid placing Questors around Red Quobelisks to reduce the chance of enemies dying and activating them.
Yellow Quobelisks
Rechargeable traps that are best used against large groups.