Hidden Mission

Hidden missions are for leveling up. You only get experience from selling goods (max +5 each time). Tips: 1. Character: Prioritize speed for skills. Upgrade carrying capacity to hold 5 or 6 items. 2. Equipment Upgrade: Focus on length first, then gears and drills (you can also watch ads for gears). The vacuum cleaner is sufficient at around level 3. 3. Helper: Train them to around level 3. They're mainly for carrying and getting gold. If you're in later maps, prioritize upgrading mining characters to operate the conveyor belt. 4. Conveyor Belt: Max out the producer first to increase sales value, then upgrade transport speed (level 7 speed should keep up with carrying). 5. Random Items: Cart - used for carrying chopped wood. Skateboard - used for carrying products to sell (this is important for quickly gaining EXP and leveling up). For others like +wood, +products, +money, it's up to you if you want to watch ads. Small Tip: You don't necessarily need to open the map, but if you stay in the same map for too long, the truck might not come. You can restart the game or switch to another map and return, and the truck will appear.