A step-by-step walkthrough for building a fully functional 2D incremental game in Unity using C#. Covers tree spawning with randomized positions, a health/damage system, physics-based radius detection for chopping, game juice (animations, particle effects, axe visuals), a gold resource manager with UI, session timers, and an upgrade tree system with purchasable upgrades that unlock further upgrades. Includes practical Unity patterns like coroutines, layer masks, serialized fields, and UI event handlers.
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