First off, thanks for all the help! I'll respond to this as best I can, and I apologize if I miss anything:
In your intro - "...going through portals be pressing DOWN instead of UP" - I can't believe I didn't think of this sooner. I'm going to try and implement this ASAP.
1. Struggle Banking - I realize now what's causing this, and I'll try to have it fixed next update.
2. Enemy Double Jump - This fix might be on the back-burner, but this is good to know, so thanks!
3. Room 1 Enemy Trigger - Fixed!
4. Mushroom Double Jumpn't - I think I may have gotten this one. Let me know if it persists in a future update.
5. Health Resetting - Fixed!
6. Boss Soft-Lock - Needs more testing to be sure, but it might be fixed in the next update.
7. Enemy Soft-Lock - Needs more testing to be sure, but it might be fixed in the next update.
Also - "I WOULD reccomend binding a quick reset key to 'R'" - is a great idea, and I'll see if I can get that implemented in the next update.
Again, thanks for the feedback and the drive folders! Very much appreciated. ／(^ x ^)＼