Play Sonic Platform Game 1
You can jump right into the action by pressing the gray button that features Play in white text. This will load the level where Sonic is standing on an elevation.
Your keyboard's arrow keys give you the ability to move left or right in this game. Other than turning left to grab a ring, make sure you start the game by going right. Speeding off to the left will lead to Sonic falling into the ocean and your game ending before it even gets started.
You can drop down to the right after you collect the four rings on the elevation. You'll then keep on scooping up rings. You can press the spacebar to spin and jump on to elevations when you see more rings to collect.
Directions
Move: Left/Right
Jump: Space