Posting my list here since I am not good with Linux and am unable to TAS these myself. I have tested all of these games and they are fully-functional in the latest Ruffle version.
Super Mario Moto • My brother and I both thought this game was
hilarious as kids. It's Mario on a
freaking motorcycle riding through a level while doing outrageous flips throughout. Pretty hard game, too. I know changing the motorcycle pitch can affect the speed gained upon landing, so it may make for a flashy TAS.
Dutchman's Dash • Was a Spongebob flash game on Nick Games back in the day. I didn't get very far in it because of the game's strange momentum and hit detection at times. Would make for a
very impressive TAS, as the existing
speedrun is nowhere near clean but still impressive despite a couple of deaths.
Mario Starcatcher 2 • I did a
speedrun of this many years ago. It is a very basic platformer and I think would be simple and quick to TAS.
Supra Mayro Bross • I did a
speedrun of this one too and I hate to say it, but
this is my most-viewed youtube video at almost 100K views now... I'm not kidding. Yes, the TAS would be trivial and silly, but it may be popular with viewers because heehee haha funny meme.