I like how the button started moving rather than just staying still. It made the game more interesting to play, however at one point, it began moving too fast and it was hard to click because it was moving all over the place. I think the strategy is to keep your mouse still and click only if the button moves close. I also think that if a sliding/moving animation was added to the button, so that you could predict where the button will go, it would add a lot of fun and deterministicness to the game!