It’s a good starting concept, and I honestly think you have some potential!
Obbies are honestly just very bland in general, so think of ways you can make it unique. One of my favorite games at the moment is Journey to the Sun, an extremely fun and beautiful obby-type game. If you can somehow turn a basic obby into a fun player experience, you should be set for game popularity.
A few things to note with journy from the sun:
It’s open ended yet you still clearly have a direction to go in.
A clear end, you have a goal to get to.
A story, it has a clearly story and lore you can engage with.
You slowly get more and more powerful as the obby goes on, as you unlock new abilities.