Great game, would be good if we could pick a category such as tutorial or rollacoaster, and then pick the top rated or hotlist from within that category.
Birds should start out smaller and then get bigger as you get higher. That makes it not frustrating when you start out really fast and immediately hit birds, as you could smash through them with enough
upgrades. Otherwise, smooth enjoyable upgrade game!
Thank you for your feedback. I will start working on them for a update! =)