There's no movelist or control menu or anything, so good luck with trying to figure literally anything out.
To be fair, i got this game as a joke, and it did not disappoint.
That being said, the developer has shown an ambition in the store page's comments, so I'll leave with this:
The game, as it is, is very difficult to find merit in, but I've made games before, so I know how difficult it can be to make a game. I appreciate the dev's comments, and it shows he has an appreciation for this, and I appreciate that as both a player and developer.
I'd recommend watching game design videos by the likes of Core-A gaming, and taking notes from the "greats" of fighting games, stuff like Marvel vs. Capcom 2 (playable through the Marvel vs. Capcom Fighting Collection), Capcom vs. SNK 2 (playable through Capcom Fighting Collection 2), Street Fighter III: 3rd Strike (playable through Street Fighter 30th Anniversary Collection), Tekken 7, and Street Fighter 6.
Take notes on what makes those games fun along with Core-A's videos, and it can help a lot to further your journey into making fighting games.
There's stuff here that's already fun, like juggling opponents in combos. Build off of that, add graphical style, unique designs if you can, fun music. Wherever you can add stuff to make your game special, do it.