Building a Parking Puzzle in Unity: A Systems Breakdown of the Park Match Mechanic

Parking and matching puzzles look almost insultingly simple from the outside. A few cars, a cramped lot, tap or drag to move them out. But if you've actually tried to build one that feels tight — no janky collision resolution, no ambiguous "why didn't that move register" moments, no lag once the board gets crowded — you know there's a real systems design problem hiding underneath what looks like a weekend project. I recently went through the architecture of a parking/matching hybrid template built in Unity and wanted to break down the core systems the way I'd want them explained if I were reskinning or extending one myself. This isn't a marketing post — it's a walkthrough of the actual mechanics: how vehicle movement and collision resolution work, how the match/clear pipeline is structured, how level data is separated from movement logic so hundreds of levels don't require touching code, and how monetization hooks slot into natural break points without polluting gameplay scripts. If you want to see the finished product this breakdown is loosely based on, there's a working template here: Park Match Unity Game Template . Everything below applies whether you're building something similar from scratch or extending an existing base. Why Parking Puzzles Are Harder Than They Look The core loop — tap or drag a vehicle, it exits along a valid path, the lot clears one piece at a time — is trivial to describe and genuinely fiddly to implement well. Four problems show up almost immediately once you move past a static mockup: Valid-move detection : how do you know, at any given moment, which vehicles can actually move given their orientation and the current board state? Path resolution : once a vehicle starts moving, how does it navigate around other vehicles and obstacles without clipping through them or getting stuck mid-animation? Match/clear logic : when does a vehicle actually "clear" the board — on reaching an exit, on matching color/type with another vehicle, or both — an