JMPR - 100% Completion in 80 deaths (No Quit to Menu)
Short explanation:
This is a "Meatboy-like" game with 67 levels, each with 3 variants, normal, X (hard variant), and Z (invisible variant). You need to complete each of the 3 versions of all 67 levels, plus collect all of the items, and finish the 4 challenge rooms in one run under 100 deaths total. You can choose any level order you want for the run.
This ended up being a weird experience. I initially hated the movement and struggled to get comfortable enough to make anything consistent. Eventually things started to come together and the run finally got knocked out.
The beginning of this run is really bad, but I wanted to just finish out my first "block" of levels and then restart, but I ended up undershooting my benchmark and kept going. I had some stupid mistakes here and there, but otherwise a lot of problematic levels I got really lucky with.
I had one run before this that had 102 deaths, and I barely missed the mark.