I really appreciated the loading screen. I loaded up the game twice and found different messages each time - that was pretty cool.
The art was excellent, and controls felt spot on (challenging, but purposefully so - felt like something I could build expertise in).
I think besides just wanting more gameplay + music/SFX, two main pieces of feedback:
1. The tutorial instruction felt obstructive. I would've liked it to have gone away after some period (maybe pop up periodically if the player still hasn't completed the task) or maybe just more subtle (smaller, in a corner of the screen or a less vibrant color)
2. I went the completely wrong way to pick up the passenger, so ended up exploring the whole map until retracing my steps to the beginning to go right at the start instead of left to find the passenger. I think it'd be worth considering making it so the player can't possibly go the wrong way for the first passenger, so they don't get bored/lost from the very beginning.