Similar to Snes9x 1.51 Emulator, I always press on – (to speed down under 100% such as 75%, 50% 25% – very slower) and + (to speed up) buttons of key from my keyboard to speed up or speed down.
Desktop and laptops already had – and + keys, not hard to find, really easy to do it. I tink you need to move setting to – (to slow down speed) and + (to speed up) keys on keyboard will be great idea.
Need to fix problem, instead press on Tab tab one time, then game will speed up, when you want to stop speed up, just hit Tab key again to return back to normal. I know due to RPG games must speed up and play in no time! I know all RPG games are put us wait more more time like slow!! RPG games are waste our time right? Answer is Yes! Then speed up and will help us play RPG games faster.
Hold on Tab is not good idea, it will make your finger’s muscle sore or pain when hold on tab key for a long time.