part 1
The concept is cool especially with the twist in each new level. However, I feel like the twists might be caused by some elements of the game being unclear. like how fast the kid walks and falls, how fast the cart goes and if the buildings are just background art or actual platforms. I think these elements should be polished some more and once you have them done properly, you can start exploring cooler level designs. I suggest you also re-think the visuals and try to create an art style that is more consistent. for example the patterns on the ground don't fit the style of the buildings and the while the little kid looks adorable, the guy pushing the cart looks like a psycopath.