In swarms bases, it has been confirmed there are several sub-games, for practicing and entertainment. However, one thing that i think would be cool is an archery range. This would let you get used to Hive’s bow physics as well as just general sniping.
How would it work?
I was thinking (with the help of @OnlyOrbixx ) you would be able to choose a few vantage points where you could take shots from. You could then shoot at a multitude of target blocks at a multitude of ranges. Some targets would be static, others would be moving constantly, maybe even with varying speeds. Some targets, upon being hit, will unlock more targets that were previously hidden.
Points:
Different targets will give a different amount of points, to go onto the swarm leaderboard (vote here). This could help you gauge your skill level as well as compare yourself to others.
Modes:
There could be two modes: competitive and practice. Your scores would only be counted in competitive, but would still be recorded in practice so you know how well you did. Competitive could be 5 minutes, where as practice could be infinite.
Concept images (To be updated if I or Orbi can be bothered):
a concept for the entrance, made by @OnlyOrbixx