A few tips for newcomers: 1. When levelling up outside the stage， prioritise upgrading your primary weapon. Purchasing powerful， high-tier weapons will boost your monster-clearing efficiency. Leave increasing your health points until last， as health packs can be picked up within stages to replenish your health continuously. 2. Upon entering a level， note the spawn points for zombies. Avoid positioning yourself where you could be attacked from multiple directions. After clearing a wave， take cover in a corner or behind cover. This allows zombies to converge from a single direction， significantly improving your shooting efficiency and preventing wasted ammunition. 3. Each level features target wave objectives. Upon completing these， refrain from exiting immediately. The level then transitions to Endless Mode， allowing continued zombie elimination to accumulate gold. 4. Please note: when your magazine is full， holding down the trigger allows you to fire in bursts with the submachine gun； however， when ammunition runs low， you can only fire single shots. Defeating zombies may result in them dropping magazines； picking these up will replenish your ammunition. Therefore， during combat， keep a close eye on your ammunition level in the top-right corner.