It's a very nice idea - I fondly remember the olden days in which I was cruising with a shopping cart across the parking lot. However, since you start with a very high speed, the level design and intended path should be adjusted. Maybe the perspective too, since at first, I couldn't really make out where I was supposed to go despite the giant arrow. Though maybe the shelves were blocking the view a bit too.
For this particular game, I think one long track could be better suited instead of multiple rounds. Or, if you decide to keep the rounds, maybe the "finish line" and the round counter could stick out more visually to indicate when you passed one round.