It is simple and clear, but I think it is staying at slow speed forever, and it would be good to make it a bit more challenging later. Some coins slip away from the screen due to the camera moving the opposite way while the pig is moving that way. Maybe could limit the camera movement and coin spawn area to prevent some coins being unreachable. Other than those, there is no issue. But I think, an amateur sketch could have more personality than neat shapes like this. I am not sure how would it be in your case, but perhaps you should try. I often get more invested when graphics look messy but personal. Although it is a personal preference, you should surely do as you feel like. Overall, pretty good, especially hearing that you drew it all and made the music yourself.