the user interface is confusing (at least on desktop).

• the title is not readable when the image has light colors in it, e.g:
• it seems to save what shows I have started, but i don't see where it is stored (e.g. do I have an account? is it in local storage? can I sync my progress between devices?) edit: after looking at the github, it seems to be a PWA, so storage is probably local storage, I guess?
• the target audience is not obvious to me. I gues it is for anonymous watching of single episodes without an account and without any social features or watch lists? Is it aimed at casual watchers or power users?
• it would be nice to see what exactly the release is of the show I am watching (official subs? fan subs? BD release?)

my recommendations:

• clean up the start page:
  • the header with the random show confuses me a lot. I would just get rid of it
  • the news on the side-bar seems to be out-of-scope. It adds to the confusion, but doesn't seem to add to the main function of the app. I would also just get rid of it
  • "continue watching" should be the first group. And I should be able to remove stuff from that list easily. Alternatively: a dedicated page for "continue watching" that I could safe as a bookmark.
• the start-page should tell the user
  • what to expect from this website,
  • whom it is targeted at and
  • how it is intended to use (e.g. with a link to a help page)
• regarding the player :
  • It would be nice to be able to select different streaming sources.
  • since it's a PWA, it would be nice to auto-download episodes and watch them in offline mode later (kinda like mangas on tachiyomi). I am not sure how difficult that may be though. But I guess this would be killer-feature for this app for watching anime on train rides.

in general I recommend to have a clear vision, and a simple UI that makes it painfully obvious for use how to use the app. User feedback is very important, but it is more stick with a clear vision. It's ok to update the vision based on user feedback, but when you do, don't do it accidentally (which would result in massive feature creep), and instead do it intentionally (which ususually comes with a removal of features, that clash with the new vision). I also strongely recommend to have a simple and clean architecture, and be wary of new features that don't fit into your envisioned architecture.