A fantastic game that I am not nearly good enough to beat. The graphics and sound mix together to make a fitting atmosphere, and the central premise is compelling enough to make a full game's worth of levels.
As is common for game jam games, I do feel the levels are massively undertuned. After dozens of levels that required perfect usage of shots, all while avoiding taking a single point of damage, it got to the point that the moment I made any mistake, I spammed the gun to kill myself quicker. I don't know if "Nintendo Hard" was what you were going for, but if it was, I would prefer that enemies outright killed me, rather than giving me the hope that I can still complete the level. If it wasn't, maybe give a bit more leeway with jump height and amount of starting health.
All in all, Excellent Work! One of my favorite games this jam.
Edit: According to the lower comment, I also made it to the last level.