I 100%-ed the game! ...sorta. I killed all of the enemies but try as I might I couldn't find the final portal. I did end up using the Give Up menu to cycle through to see what was past the last level and man, the credits... much appreciated!!
The value of this game is crazy. 7 fully populated and varied 3D environments with platform puzzles and diverse enemies. I don't think I'd ever have believed someone describing this game to me on NES.
It blew up on youtube! Awesome! It looked like the top comments were neck and neck with how impressive but dizzying/confusing the graphics were. I went into NESDEV and response seemed about the same. I personally love the graphics and both my 11yo son and I had no issues navigating the environment or identifying enemies, especially with the recent releases. I checked the post again and I see a lot more support now. I think it just needs more footage out there and more people playing it to gain traction and grow wings.