Letni is the first level of the episode Ballistic Bunny from Jazz Jackrabbit.
This is Devan's ENORMOUS supercomputer designed for building battleships, destroyers, and figuring out where to get lunch on a rainy Tuesday afternoon. Beware of magnets and "bugs" in the system.
Letni is another maze-like stage. The most immediate hazards found on it are magnets which will pull you towards the ceiling or walls, as well as spark-barriers blocking narrower passages. The stage is also littered with Arachips crawling through the floors and often positioned on strategic places like high platforms.
On the first area you'll come across another high speed zone with a invincibility item above the high-speed shoes and a easily accessible Hip Hop.