Capture the flag, by 
A futuristic vision of how much better our cities could be. Efficient yet cozy apartments. Progressive zoning laws recognizing the utility of mixing residential buildings with cafes, optometrists’ offices, and fireworks. Spacious, scenic sewers. Neighborhoods navigated with rocket jumps instead of noisy, dirty, dangerous cars.
Central Park’s a big level with lots of paths, but with all the long-range powerups and ammo around, you can expect to roast and get roasted pretty fast anyway. Cool all-directions gameplay in the center, with the carrot and powerups being tempting but difficult to control, and the bases are also vulnerable to long-range attacks from several directions.
It’s a Loon level, so of course you can expect lovely visuals with inventive tileset edits. The park and buildings are nicely rendered, with lots of neat little details and color choices that distinguish them from every other town level, and a few simple additions even breathe new life into Colonius’s sewer tiles.
Be warned, this level has a very demanding script (every pickup has a custom behavior to prevent being shot down), so you’ll need a fast CPU for the best experience.