Flower vs Zombie: City Defense presents a tower defense experience where players protect major global cities from zombie invasions through plant merging and strategic deployment. Developed by HCC Games, this title enters the crowded mobile defense genre with a familiar yet expanded plant-versus-zombies concept that incorporates geographical variety and progression systems. The core gameplay revolves around merging identical plants to create stronger defensive units, with each city environment offering unique layout challenges. Tokyo features narrow pathways requiring concentrated defenses, while New York's open spaces demand widespread coverage. Players unlock hero characters with special abilities after completing specific battle milestones, adding strategic depth through timed power-ups and area-of-effect attacks that can turn difficult encounters. Interface design employs intuitive drag-and-drop mechanics for plant placement and merging, with clear visual indicators for upgrade paths and zombie threat levels. The cartoonish art style maintains visual clarity during intense battles, though some particle effects may cause frame rate drops on older devices. Real-world usage patterns show sessions typically lasting 3-7 minutes per city defense, making it suitable for short play sessions during commutes or breaks. With no user reviews available at time of writing, assessment relies solely on hands-on testing. The game demonstrates competent execution of tower defense fundamentals but lacks innovative mechanics to distinguish it from established competitors in the genre. The game's primary strength lies in its progressive difficulty curve and geographical variety, though monetization through wait timers and premium currency may frustrate players seeking uninterrupted progression. Ideal for casual gamers who enjoy incremental progression systems and familiar tower defense mechanics without demanding high skill thresholds or time investment.