The gameplay is straightforward: upgrade your aircraft， defeat all enemy planes， earn a high-star rating， and then move on to the next level. Consequently， the core of the game lies in developing your aircraft. Overall， the gameplay is quite good； the balance is well-executed， with level difficulty increasing progressively， as do the resources required to upgrade your aircraft. Here are a few tips I’d like to share， which I hope will be helpful. 1. Unlocking advanced aircraft is no easy feat； you can only obtain them by drawing fragments from the shop or purchasing them directly with diamonds. However， within levels， there is a chance to gain a short trial period when you defeat enemy aircraft. Therefore， once you’ve ensured your basic aircraft has been upgraded to a certain combat strength， you can also upgrade to more advanced aircraft. 2. Upgrade priorities: Main weapon > Secondary weapon > Core > Cards 3. Resource management: The New Player Pack is excellent value! The Diamonds you receive can be used to purchase high-tier aircraft from the shop， which can instantly multiply your total combat power several times over. We also recommend purchasing the shop’s Daily Packs， as they offer much better value than buying Diamonds directly. Furthermore， Daily Quests and Achievement rewards are another way to obtain Diamonds； whilst the rewards may not be substantial individually， they add up to a significant resource over time. 4. When you hit a bottleneck in a level， you can use gold coins to exchange for a single use of a high-tier aircraft. However， it is not advisable to use this on earlier levels； try to save your gold coins for upgrades instead.