I've noticed that many platform games uses the foxengine as the movement script. This is an alternative that contains many useful things that the foxengine doesnt have:
Main features:
Hspeed and friction.
100% Pixelperfect collision, no maxspeed.
Bug free character collision.
Slopes with increasing and decreasing speed while walking up/down.
Jumptrough platforms
Jumpthough platforms features
Works with more then one character.
Moves horizontal and/or vertical.
Never changes direction/speed because of the characters.
The engine also contains:
A simple enemys AI
Gradual jumping
Midair friction
Sprite changes
This engine does not use solid objects and hspeed but only homemade variables.
Its more advanced then the foxengine, and it is recommend that you know GML well.
Please report any bugs,
gm6 reg. and gm7 pro included.
It works it unreg. versions aswell.
Enjoy, Jenner
The AI is funny. If they bump while facing each other, you see one bigger smile than normal. This engine was sort of easier to understand than FoxEngine, so I prefer this one :). 10/10
very confusing, but I did lear a lot, and still learning.
PS: you need to set a hsp os vsp.
I would suggest adding another sprite for up movement.
Ill try a sloped jumpthrough block.
PS:Jenner: what is the rest of the description?
i got stuck with those things and couldn't move at all 
