Jackpot Express invites players to a vibrant world filled with the glitz and glamour of an old-school New York state, shown through its five reels and three rows setup with twenty paylines. What really sets this game apart are its various bonuses, including an exciting jackpot game and three different kinds of free spins, offering a constantly engaging experience. Its return to player is just above average, giving fair chances of winning, although the range of bets from small to large caters to different playing styles. The game's medium/low volatility, however, means it might not be ideal for those looking to use high-volatility strategies.

Visually, Jackpot Express is a delight. The game takes players to a stylish era reminiscent of The Great Gatsby, where characters and backgrounds are crafted with flair and elegance. On the deck of a sophisticated gambling boat, each symbol comes alive with animations, and wins are accompanied by sound effects and a delightful jazzy piano tune, enriched with brass band accents. These elements together create a compelling and immersive atmosphere where players can lose themselves in a fascinating virtual world.

The theme of Jackpot Express takes players on a journey aboard a diesel punk gambling ship, evoking images of riverboat casinos with an art deco twist. The characters, including lively flappers and charming cads, along with poker chips adorned with card suits, enhance the nostalgic vibe. Despite its strong thematic foundation, there is a sense that a little more could be done to inject additional energy into the setting. Nonetheless, the world-building matches the quality expected from Yggdrasil Gaming slots.

In conclusion, Jackpot Express blends a picturesque setting with engaging gameplay and a variety of bonuses that keep the excitement alive. While it excels in many areas, its medium/low volatility somewhat limits its appeal for those seeking high-risk, high-reward experiences. However, for players more interested in a charming gaming environment and consistent play, it offers a delightful backdrop to imagine mingling with flappers and dandies. Whether betting conservatively or boldly, players can enjoy the captivating aesthetics and animations that bring this unique slot experience to life.