Is there any chance, the game will be finished one day? I already played when only two chapters were out, but after chapter four - years ago - it seems abandoned now. Maybe it's not, but it seems so.
It is not abandoned. The creators are very active over at Discord, BlueSky, and Tumblr. They just released a sneak peek of a new background for the next episode. They put Scarlet Hollow on hold for a year (mainly 2024) to release Slay the Princess due to financial reasons but now they are focusing 100% on releasing episode 5 (supposedly to be the biggest episode yet) this year. Worries not! The quality they put in their games makes the wait well worthwhile imo.