I want to play jacksmith and I want flash player back and Im really pissed. BRING IT BACK NOW.
Won't happen. The Flash Player is gone for good. It was too much of a security risk and with advances in web development technologies (HTML5, WebGL, etc) during the recent years, there is simply no need for it anymore.
Developers of Flash-based games need to convert their games to these alternatives. Better contact the developer of Jacksmith.
Here's the original EOL announcement form 2017. It describes Adobe's plan to bring Flash Player to it's End of Life, and links to the roadmaps of each of the major browser vendors, who will be removing support for all browser plug-ins around the same time.
More info in the FAQ: