Reached up to 210 and more. I guess "surprise" is nothing implemented yet.
If you enter the Settings menu while playing the game, it restarts.
The game seems endless like Tetris but has no states to determine when you should get a "Game Over".
I would like to suggest a some kind of "Healthbar" which reduces on Miss and regains slowly after some consecutive successful clicks. With this, you will be able to actually lose a game, make a challenge for the player to get high scores before Game Over, and encourage to reach the top of leaderboard.
And lastly, the game speed reaches MAX very fast, so it would be great if you reduce the tempo a bit.
Thank You for your hard work!