"Brawl Bowl" by Gears, a custom level for Manic Miners.
Objectives: Find the hoard. And don't lose your Tool Store!; Collect 70 crystals
Size: 24x24
Well Cadet, here's another tricky one for you.
We found a surprising amount of energy crystals hidden in a little nook inside one of our bigger vein operations. Trouble is, the place is apparently a bit of an attraction to the local monsters, and there's a huge amount of them just waiting to smash your face in down there.
Regardless, we need those crystals. Get operating, build a base and prepare your defenses. Ensure you don't lose your starting Tool Store, and face the monsters head-on. You might want to man up before doing so though.
Take care Cadet, once you cross the ore veins, the detected movement mostly started around there.
Once you clobber all the things, gather 70 energy crystals.