I built a map to practice accuracy. I built it in 1.16 and recently updated to 1.18. However, it still works in older versions.
The goal is to hit as many targets as possible in 2 minutes. You get visual and auditory feedback when a target is hit.
You can see your current score above the hotbar. At the end, the score is displayed on a board, along with your highest score.
To end the game early, just go back towards the lobby.

My personal highscore is 87, try to beat it!