Already answered: How popular are educational games these days? I also made a post in this thread
Most of the time, the game is worth making if the genre is popular on the platform. Name one educational game in Roblox. Maybe Lua Learning? How about educational games that are gamified? None whatsoever.
Most educational games are aimed towards adults anyways. I don’t think there are that many adults in Roblox nowadays.
Educational games are only successful if the designer manages to hide the learning element behind gameplay-- make it obviously and it might not be successful; it already seems difficult on paper. You’d have to invent your puzzle/logic mechanic to attempt at one.
Most of the time, good educational games revolves around the masterful use of paradigm shift, players having this mental shift is extremely rewarding; enough to hold a player’s attention.
I wouldn’t make an educational game in Roblox.