itch.io

Here's how I would go about procedural generation, especially for a game which goes on for infinity. I would make prefabs of what you want the levels to look like. Then instantiate them every time the player gets past a certain point while deleting the previous prefab. This way you have control over what each "stage" looks like, the player can memorize and get better at crossing each "stage" and the game isn't too laggy.