Redid post cause it would not edit for some weird reason...
@walter-c thanks for playing the map I made, and well, that was the idea since I wanted to make a map inspired by Mt. Erebus since I love Ultimate DOOM...
Finding all the keens hidden in the map rewards you by making the final fight much easier, also here's a hint.. if you've ever played Super Mario Bros, then by trying something you will be rewarded with one of those hidden keens, it's an easter egg of sorts...
As for the Skull Keys, they are for additional pickups which are honestly not needed to beat the map, but can help you a lot if you do find the skull keys...
@Cuppykeks Speaking of maps, I updated the one I made with tons of visual tweaks and a few QoL changes to some of the challenges so they would be more digestible... I will link it in this post here: The_Melancholy_of_DOOM_GuyV2.wad