Natural was quite simple, despite that spot with the badge where it's relatively easy to get in, but hard to get out of. When encountering the boss there (Dark Matter), it all started out okay, but it was kind of easy once I figured out I could just hover over it and fire from a safe spot in midair (No, it's not an invisible platform, just using the Levitation Stone).
Then came the blocks... Ouch is right!
After awakening, my 7 Life went to 10 right off the bat (The Life Capsule in the bed at Crystal seemed to vanish, too).
It is possible to get trapped inside the chamber where Angel was trapped & there's no way to return back up the gap in Natural (Which, I would've figured, had falling blocks still dropping there, but I guess not). That "Secret Passage" in Phantasmal wasn't opened after the events in Natural, as well.
Only one place to check, and it was the Modern Mech area. For some reason, I felt compelled to sing DoggyDude8912345's (JacobX891) "Metalogz WTF?" song, even though I started doing so long before I got grazed by one of the treads (Ouch again) and hit by a missile shortly after grabbing a life heart...
Then the big surprise... After succeeding (On the 2nd attempt) I came around to discover that... The machine was YOU, Metalogz?! Then I got the Life Capsule in the next area & pulled the lever, hoping the forcefields would vanish, but alas...
I go back and... Guess what? Here you came again, Metalogz! I started singing that song again, but with more feeling this time around (Still not enough to include the full swear words, though) & barely pull off the battle again with an empty Spark gun & about 108 shots in the pistol left (Wasn't it called something else in the earlier releases?). Also, the event at the doorway was missing (It normally mentioned something about nothing being on the other side of it), so I guess that's the end of it, back up my spirit at the container near the door, and return to the other room, jumping into the tallest forcefield and "climbing" up it using the Inventory Menu to disable the temporary invincibility.
Why would I do that? I didn't deserve to live after killing you once, let alone twice. I had to make it up to you somehow, heh heh.