Sydney has a great, colorful palette filled with warm colors and simple, cartoonish pixel art. Very similar to games like Day of the Tentacle and Sam and Max Hit The Road. Animations are great but some of the areas have walkcycle glitches.
Sydney needs a better soundtrack. There are too many quiet areas and I can't remember any of the tracks that played during the game. Sound effects are good enough, though.
Standard point and click adventure gameplay. There are three playable characters and some challenging puzzles to keep you playing for a good length of time. The story is quite humorous and memorable.