If you're asking about web version, then it's complicated. TBH it kinda works in portrait mode but I couldn't figure out the proper setup for itch to allow switching between landscape and portrait. And had not enough time to dig it in deeper.
You can check the version on https://www.newgrounds.com/portal/view/927534 where it works somehow.
If you're asking about android version, then yes, it also requires time. And mobile adaptation didn't get enough support for now, so it's delivered 'as is'.