I enjoyed this. 3 lvls was the perfect amount. After the 2nd lvl I decided I would play one more than then move on, and then found out that was the end anyways.
One problem I found was that if I was just skating around (b/c I was looking for a flyer stand) the background got kind of jittery instead of scrolling smoothly. Even just for the one lvl where I had rollerskates, I found I was getting nauseous by the end.
I also found that I often got quota with 20s to spare, and the last 20s felt like busy work. Sure, you get more money to buy more powerups, but I wonder if maybe ending the lvl when you hit quota, and then giving people the chance to pick 1+ rewards based on how quickly they did it might be better. So, finished with <=10s, you can choose one powerup, <=20>=10 lets you choose 2 power ups, >20s extra and you get 3 new power ups. That way you're still rewarded but you're not stuck with a lot of extra time after you've completed your objective.
If you decided to expand on this idea to make it a longer game, then some character customization and different levels would be awesome. One in the city, maybe a mall, a college campus, just to make it a little less repetitive. Oh, and more posters on the walls. Even if it just looks like someone plastered flyers for the arcade on the walls. I found that there were times where I'm just running along the side of a building by the exterior wall, and it looks very samey.There's interesting things in the middle, and at either end (I love that the vendors get some text), but the outer sides feel a little neglected.Very well done given the time constraints though