How can I make a mechanic similar to the grab mechanic in Ristar (Mega Drive Longplay [083] Ristar - YouTube)?
Hi!
You are looking for a grappling hook a.k.a Widowmakers skill from Overwatch.
There are some good video tutorials on youtube. Take a look and have fun!
https://www.youtube.com/watch?v=MR1XK-q265E