Sorry the game didn't click with you. I think I'll take this opportunity to explain some of my design choices, for anyone who's interested.
Personally, for this kind of game, I prefer arrow keys + ZX. It's common for emulators (e.g., NES/SNES) and RPGs (e.g., Undertale). The game also supports controller, and if I continue development on this, I'll definitely add key remapping.
The problem with WASD, at least as the default control scheme in this kind of game, is that it's not clear what keys should be used for actions. If there's just jumping, the space key is a common choice (although not my preference in a 2D game), but this game has attacking too. I've seen people use the numpad, but afaik it's not that common. I've also seen some jam games use WASD + left/right mouse buttons, so I suspect those may be defaults in Unity, but unless a game also uses mouse movement in some way I kind of hate that. (For the record, I think the controls in your game were well-chosen.)
About the falling speed. I wanted the character to have a sense of weight. I also give the player a lot of control over their jump in ways that may not be immediately obvious. You can adjust the height of your jump by how long you hold the button, and you can release it to quickly start falling.