Instant fun !
This is such a clever use of the theme, and i like the very simple black and white only color scheme to help with readability, and the fact that you invert the colors when you open or close your eyes is really cool.
The sword slashing is also really fun, and the overall gamefeel is quite satisfying thanks to a very complementary sound design.
Had a blast ! Even if i didn’t survive all that long XD
Great job :)