I really want to start speedrunning the game but i dont know where to play it from so it can be acceptable to the leaderboard.

Oh hi, sorry for not answering earlier! Currently the only website from which the speedrun is counted is www.notdoppler.com/roguesoul2.php

The second option is to download the rogue soul 2 flash file from the same website (by going into the inspect element and directly download the file) and then running it from a flash runner.

If you want on Monday I will have access to my PC , so I can send you a zip package with all the necessary files.

Also, we just created a discord!! Here's the link: https://discord.gg/p2mQ6yr

Actually, Notdoppler provide the SWF for free for people to add to their websites: http://i.notdoppler.com/download/roguesoul2.zip