im trying to make a side scrolling engine in which a wheel moves across terrain, up ramps, up elevators, on moving platforms, etc. im good at coding but i cannot do gravity, collisions, and stuff like that. my wheel object has some semi-complex moving actions. the .gm6 file is right here
http://64digits.com/users/JSentinal/coolness.gm6 if you want to look at it. there is also an explanation of the code in it. in the game, there are some platforms and ramps, that i would like the wheel to be able to roll over. i would appreciate it if someone would guide me in the right direction with this gravity and collision thing. thanks.