Thank you!
Sorry to hear that there are issues with the viewport for you - would you mind letting me know which browser you are using, and what your screen/monitor resolution is? Also - did you play the game in the itch.io randomizer frame or directly from the game's itch page (without the randomizer frame)?
Edit: resolution was fixed to 1920x1080, so it was probably too big for some browser/monitor setups. its now way smaller by default and should scale correctly in fullscreen.