There will be three difficulty levels. Main difference between them is the speed of the gameplay. The original idea was using obstacles in completely random order, but during testing I found out some pre-defined patterns would make it more enjoyable. A tiny PHP script helps me to generate JSON files that contain object sequences. I mix resulting JSON data with random items to make it better or even harder to get higher scores. This also allows me to add various power-ups, even I just add some coins in the beginning.