Their game is completely different from Silksong, why is there a problem? Even though, they could have turned it into a marketing opportunity, touting as "The only game which didn't back out of releasing on the same day with Silksong!" and they would have been featured in all news alongside with it. It could have been a Barbenheimer moment. Instead, they did nothing and just being bitter at their fellow devs for being too successful. Skill issue.