"Here There Be Monsters" by EmergentDesigner, a custom level for Manic Miners.

Objectives: Collect 100 crystals

Size: 64x64

Here_There_Be_Monsters ™️ (v1)
NOTE: Requires experimental Monster build to play, download at potential risk to your own files, so be sure to back everything up beforehand.

TLDR: Are you looking to play around with Monsters but can't be fussed to do the scripting yourself and think the Classic Campaign is a little too easy? Well then, this map is for you! Straightforward enough "collect 100 Crystals" map, but Monsters are about! You can expect Monsters to emerge every 60 seconds or so (I think it scales with gamespeed) from anywhere on the (discovered) map as you traverse the cavern.
Features: Some landslides, uneven terrain for more challenging base-building, 6000 starting Oxygen (10 mins for 10 Miners), diverse Wall types, aesthetic Lava (currently no erosion), and several branching caverns to discover for moderate replayability.
Platime/Expectations: About 1 hour to beat on x2 speed, depending on how well you balance exploration against Monster management.

NOTE: You MUST turn Action Stations on at the start of the level! You start with 3 Miners equipped with Laser Beams to fight off a Monster that appears at the start! As soon as that Monster is dealt with, get some more Miners in, arm them, and get started on drilling/base building. Expect to be toggling Action Stations on/off throughout your playtime. Additionally, I suggest keeping some miners unarmed, so that when Action Stations is on you can maintain productivity.
Have fun!