Viability: Playable all the way, story makes sense, very good! One question I have is whether the HP is supposed to continue going down during every passage between when it starts going down and when it is stable. I only see it during the first one, but putting it into every one would raise the stakes if you're interested in doing that.
Presentation: There is a bit of an issue with text going off the edge of the screen. It only cuts off a letter or two at a time, so it's not game-breaking, but adjusting something to fix it would be very nice. Proofreading for typos / grammatical errors and such would be good too.
Theme: The theme is absolutely 100% on point, and the artwork looks awesome and fits perfectly. The story is great, the references are funny and well incorporated, and the ending works really well.
Engagement: I was engaged from the get-go. You nailed this!