Did you try downloading it again? It may have been when you downloaded the file... Today I updated to correct the last character.
What you can also do is download the smartphone version, go through the beginning, save the game and then use this 'save' in the windows version.
Or if you prefer, download the save I've just made here, so that you 'skip' the first battle. Paste this 'save' folder in the same place as the game.exe
The only information you 'lose' when loading this save is the first battle and the warning about the items in your inventory, in the 'Key' tab.
well i did everything i could until i reached the king and got absolutely shit on as i was 8 lvls below his li's. couldn't even get a hit in lmfao! seems like a extreme amount of grinding is involved here to even get past 1st boss. ngl i'm not doing all that when the animations not working.might check back at a later time tho. cool concept
If it doesn't work, try installing the K-lite video codec from the official website, the default version may already work: https://codecguide.com/download_kl.htm