The game was a lot of fun, with playful music and art. The upgrades made it very likeable, although I missed being able to tell when I would receive the next upgrade. Also, I feel like "Puppy Eyes" was the best upgrade, not only because it made the taxi way easier to handle with lower speed, but also because it felt like the upgrade with most immediate payoff, which is something that I missed with the others (with some exceptions, like the one that gave you $10 every 3 seconds, that one was very noticeable too).