In Duo Water and Fire, you can use the fire power to melt obstacles or enemies, and the water power to extinguish fires or dissolve certain barriers. Each level will present challenges that require a combination of both abilities to overcome.

The primary objective in each level is to find and collect both the red key (fire) and the blue key (water). Once you have both keys, you must locate hidden treasures and gather all the gold. Finally, reach the exit door to complete the level.

No, you alternate between playing as the fire character and the water character as needed to solve puzzles and progress through the levels. The game switches control between the two siblings based on the challenges presented.

Yes, the puzzles often require you to think about how fire and water interact. For example, using fire to create pathways or using water to cool down hot surfaces. Experimenting with the timing and sequence of your actions can help you solve the puzzles more efficiently.

The game ends when you successfully complete all the levels by collecting the necessary keys, finding hidden treasures, and gathering all the gold. Each level has its own set of challenges, and completing them all will lead to the final conclusion of the adventure.

There is no strict time limit for completing each level in Duo Water and Fire. However, efficient use of your fire and water powers can help you progress faster and collect more rewards.

If you fail to collect both the red key (fire) and the blue key (water), you won't be able to proceed further in the level. It's important to explore every area thoroughly to ensure you find both keys before moving on.

Unfortunately, once you complete a level, you cannot replay it to earn more gold or find additional treasures. The focus is on progressing through the story and completing the game successfully.