This is a really good idea for a one button game. Pressing the spacebar gives the right feel for skipping the rock and this is reinforced by the satisfying sound effects. I love the art style of the game as it reinforces the relaxing feel of the game! Additionally, adding more visual elements to know when to press the button to skip the rock would be nice since right now its more of a press the button as close to zero dynamic. Also maybe making the distance a bit smaller because on the average attempt getting over a Km is quite the arm. hahaha but seriously an awesome game!