couldn't you just scoot the keyboard over so your right hand can use it? I do see what you mean though. But usually you can change it in the options menu.
It's up to the developer to decide what controls they want to use, and it's not completely up to ArmorGames to decide what the developer does. They only have a few developers (like John or Krin) who actually work for them, all other developers just submit their games and AG chooses to accept them or not.
How difficult is it, really, to make the game accept arrow keys as well for movement, as most seem to manage to do?
It's not very difficult at all and i would consider it a major design flaw.
Be careful before someone locks this forum. A little question like this usually has people repeating the same thing over in a different way. Anyways......Games with WASD sometimes are built so u can change WASD to other keys such as the four arrow keys. Usually u can use both the arrow keys AND WASD for the same purpose in that certain game.
I understand where OP is coming from. It's a pain using the arrow keys and a mouse when you use the mouse with your right hand. I imagine it would be annoying to use the mouse with your left hand and the wasd keys with your right. As has been said, you just need to adapt.
When I was just a wee little lad, I used to use the arrow keys for things such as racing games. When I started playing MMORPGs (never shall I go back...) I started using WASD. It's just something you have to get used to.
It's sort of like left handed people who use regular console controllers. It just takes some getting used to.