The game actually does have controller support! …But only in the secret multiplayer mode. And it’s not really supporting controller since it just treats the analog like it’s standard directional inputs. I was considering adding it as an option, but decided not to as a big problem with using them for platform fighters is how they increase the game's skill-floor, it becomes much harder to perform optimally. Professional melee players use expensive gamecube controllers that have built in notches for the analog stick so they can consistently perform the longest and shortest wavedashes possible (As well as optimal Fox and Falco recovery angles). This can make the tech feel rather inconsistent for anyone without those notches, especially so for new players. This game is rather simple so I chose to only add one wavedash angle that’s always consistent, and if I were to develop it further I could add inputs that allow for min and max distance, making for three different wavedashes that you can always do consistently. That’s what the smash box does (basically a more elaborate keyboard made specifically for competitive melee). Personally, my preferred way to play platform fighters is with a controller, for the reason you said, it gives the player more exact control over how they move. But for a single player platform fighter that is made to be understandable to players who aren’t used to the genre I think keyboard controls make it way easier to get into. So I chose to leave it as is.