Why not just allow custom key binding? Surely this would benefit all, especially those with special needs.

That's so kind of you. Thank you!

Key bindings...

Set 1: WSAD + L Shift/R Shift /Q (Back/Cancel) + E/Space (accept) + Enter (Menu)
Set 2: Arrow keys + Z (Back/Cancel) + X (accept) + L Shift/R Shift/C/Enter (Menu)

Wish I could cook him... Anyway, I beat the game. THANK GOD I'm done with that!
Please add key bindings. No matter what, I could not get used to them on either input device.
I had some problems with the joypad, but I assume it was the GM fault, as the controller responded flawlessly on other platforms. Turning it off/on was a temporary solution.
The shopkeepers UI looks cool but is hard to navigate. I hate it takes so long to loot coins. The shop in the pork town works like it should.
For some reason there was a third slot available in the items menu, but nothing was there. 
I hate you can't open the chest on top of the tower at the beginning.
I hate you can't heal yourself on your way back from the top to the old lady at the bottom. Can you actually do some 'tricks' with the jump/dash without taking significant amount of damage?
I hate platforms can move you. Also hate you can't jump on them from below.
I hate respawning  enemies and when they do they sometimes change their walk pattern.
I hate some enemies' AI is basically a random walk cycle which is unpredictable.
I hate enemies kill you when touched despite health bar.
I hate the pig in the jail sometimes kills you sometimes doesn't. I hate the pig near the save spot had 3 hp instead of 5.
I hate fall damage.
I hate spikes on the wall have too big hit boxes (why are they even animating?).
I hate you can't walk on the stars when escaping the prison.
I hate the 'long jump' in the dungeon.
The boss battle could be more challenging / entertaining. The boss title is kinda hard to read. Also some platforms are hard to see.
Hate it when gates don't open automatically.
Hate you can't stop reading books.
Hate you have to select 'yes'/'no' answer instead of pressing a proper button.
Hate you can save when the game tells you to.
Hate you have to re-run entire sections because of a stupid mistake.
Some things in the plot could be improved, also missed a couple of twists.
Again, fall damage! Just kill me already!
There. I'm done with my rant.

Wait... YOU INTERACT WITH THE GATE??!!

Yes, I take the elevator to go up. Then there's a room with some bookshelves and a ladder up. I take the ladder and I'm back to the entrance/exit room. But the 'gate' is still closed and I can't exit the dungeon.

SMB is a different type of game and is differently paced. Does classic Super Mario, Sonic, Mega Man Metroid, Castlevania or even Zelda games have fall dame? Some may have things that insta-kill you (e.g. spikes, lava), but a health bar means you have a chance at things that hurt you! Fortunately the load mechanics make it easy/fast to start back. The boss battle is boring AF.
At first I thought the boss was cool and intimidating. Seconds later it turned out to be a big load of meh. So much for a hardcore boss battle where you can do nothing and you won't get killed. The hand to the right taking damage (at random, until you find a pattern) is misleading, as I thought I ought to destroy that one first, then the second, etc. But nope, you have to hit the gem on its head, and still you're not sure if it actually does anything. At least this level has awesome music, which is probably the second and last thing I like about this game.
Killed that thing, got a stupid bone, can't get out of the dungeon, and still I can get myself killed. Geez...

Fall damage in a platform game? Health bar but enemies/projectiles kill you in one hit? Enemies respawning on screen? WHAT THE HELL WERE YOU THINKING?! And there's A LOT more...

Can't stand so many poor game design decisions it's infuriating!! I assume they were made on purpose just to make the game obnoxiously harder than it should be.
Also can't figure out how defeat giant boss in the dungeon. Hit his weak spots so many times and nothing happens.