Definitely a good follow-up to the original DOOMORI, it's really silly yet well-made. Here's my own playthrough for anyone interested:
I like the variety of gameplay mechanics and the amount of expanded content compared to the first game. The story is dumb and memey, but it doesn't overstay its welcome. I also appreciate the copyright-free music mode.
However, it's very difficult! I don't know it it's just me, but the "SweetHeart" level was especially challenging because of the narrow corridors and punishing platforming (you fall once, you reset from the very beginning of the level). In my opinion, I wish there was more leeway, like with well-placed checkpoints or more health in general (e.g. armor pickups like in the original DOOM).
Also, a few nitpicks which aren't essential, but maybe something to consider:
- The main menu music doesn't seem to loop, which should be standard
- There should be a dedicated settings menu, especially for a FPS game where players like to easily tweak their sensitivity and FOV
- The slow motion ability, like the first game, seems completely useless because it slows down your aim too (but maybe that's the joke?)
Anyway, I don't know if there will be more sequels considering one of the endings, but I wish the team luck for any future projects!