Sonic Can Go Only Up

This is a 2D Sonic platformer, where your goal indeed is to go up. The game is one single huge level for you to clear, with areas of said level split into different zones. Rings are sparce (you can hold only a single ring), there are no checkpoints, and you will most likely fall down a good few times. Oh, but don't worry, the game autosaves. If you're familiar with Getting Over It, Jump King, Onl...