ummm i need help with a multiplyer and a shop gui its pretty hard

For multiplayer, griffpatch's youtube has a good tutorial.
I have a clicker game in my signature below, and it has its own shop system so that could help.

i meant multiplier srry for bad spelling

also need help with codes and like a high scoreboard

For scoreboard try making it so that the money or what you use for the shop is connected to a variable and then that variable goes on a score board with the persons username and cloud network to save scores

ok thanks

um how do i make a slide varible umm only go up to 1

this is the project https://scratch.mit.edu/projects/662914259/