I recently picked up learning IL's for this game for the fun of it but I run it using the Mouse and Keyboard with the Dolphin emu.

Is there gonna be a place to submit runs like that or will I have to wait until 2043 when there's an official PC release of this game? lol

In the future yes, there will be a separate leaderboard for mouse and keyboard. It will be under MISC categories so look forward to it being there!