Is there a sequel to the game and are there more planned in the future? I hope so.
There isn't a direct sequel, but there will me more games in the same "universe", my latest game is one of them: https://vosmug.itch.io/lunar-crisis, the genre is completely different so who knows if you'll like it, if you're going to get it I recommend you wait since there's an update with a bit more contrent coming out in a few months.