Treasure hunt, by 
Treasure Hunt is a multiplayer gamemode, but this level seems to be designed to be played by only one person.
The big problem is the giant pit… if someone falls in it, there’s no way to get them out. if they have any gems, those gems are lost for the rest of the game. If they have a lot of gems, that means it’ll be impossible for anyone else to get those gems from them, and nobody will be able to win.
The other problem is there’s no ammo at all. It’s certainly possible to steal gems from other people using blaster alone, but it’s not very fun. A big part of the draw of multiplayer JJ2 is using different guns for different situations, and that’s not available here.
Other than that, the level looks nice enough, if a bit cramped in places. The walls don’t always tile properly but that’s a common thing with Carrotus/Easter. The background idea is neat but doesn’t quite work right when played in 800×600. Treasure hunt levels and Easter’99 levels are both rare. It’s just a pity the pit makes the level functionally unplayable.