Planet Platformer is a platformer engine with 360 degrees gravity. It finds the direction to the nearest planet and the player moves relative to that. So, when you walk around the planet it adjusts so you never fall off it. You can also easily customize player acceleration, friction, planet size and more.
I have since making this asset made a much improved, but slightly more expensive version that you can find here. https://marketplace.yoyogames.com/assets/1084/advanced-planet-platformer
Thanks for taking a look, and if you have any problems with this asset, feel free to email me at email@example.com.