This is a new one-button blocks game I am working on. I want to stop the “Jumpee” sprite from sliding off the platforms. How should I do this?
(Extension by felixtsu)
(This is kind of like the first part of slope-physics-demo by richard. How did he do it?)
Also, A is to jump. Sometimes when the player lands on a platform, he is not able to jump anymore. How do I fix this?
Great game!
To be sticky it means when ‘Jumpee’ is on a platform, it gains the same vy of the platform, and 0 ay.
Whether having the same vx, or some proportion of it is up to you, say vx=0 means no friction while same vx mean totally sticky.
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Thanks! This really helps! 
Although, I’m still having problems.
I have been playing with this concept too and I think i fixed it. Check it out.