The creativity behind using cordyceps was really cool, a nice twist for a platformer! The sound design was perfectly creepy and fit the theme really well.
For feedback: it’d help a lot to clearly separate the background from the platforms you can actually step on, and keep that visual consistency throughout. Same goes for interactive elements, like those purple things that kill you. Make them stand out more so players can recognize them right away.
Also don’t forget about visual feedback to the things you interact with.