Minecraft plugin ideas?

I wanted to ask you about any Minecraft plugin ideas, preferably not sooo complicated but rather a few simpler ones

Now I have no real idea whether this is easy or difficult and whether this is a plugin at all, but it would be nice if you could use something like bastighg so for minecraft challanges c

If you just want to do something to practice you can just do an Essentials plugin with so many small commands like / vanish / gm or / heal

Maybe a stick that you can tap yourself with, i.e. You look at a block r or l click and tap.

A jump and run

if you joint spawn on the block a new one in front of you and the one behind you disappear

For boredom:
-With limited area
-Highscore
-Hologram Higscore
Deactivate speed or jump
-and of course disable fly

When you have finished, I'll be happy to use it as a test plug-in on my server ^^
(Version 1.15.2)