Oh and before I forget, the Newgrounds Player doesn't work right now because an update caused Windows to block flash.
In case that happens, here is a solution by Sonucais:
https://sonucais.newgrounds.com/news/post/1137244
There are plans to update the Newgrounds Player to address this issue but I don't think it is released yet.
Alternatively, you can force Ruffle emulation by adding this to your address bar:
/format/flash?emulate=flash
This way, you can play flash content on your browser. This won't work on all submissions though.
Mikoma
The Newgrounds Player doesn't ask for your username and password.
On the part that says "Unknown Publisher wants to make changes", that's normal for most installations from installers downloaded from the internet. If I recall, this is because most installer need administrator permissions to install properly.
Just make sure that you downloaded the Player from Newgrounds itself and not from other sites. Here's a link:
https://www.newgrounds.com/flash/player
nyexcatt2
thank you i will download it tommorow