Accessibility Update #1

I've added controller support as that seemed to be the most prescient accessibility feature to add first. Hopefully it works out of the box with whatever controllers you have, if it doesn't, please let me know what you've got and I'll see about fixing it up.

I got about halfway through improving the AI before I realized the speed improvements were introducing minor bugs. So I decided to bench that for now to get a working controller version working. Depending on how my dev time goes, I might fix this up first, otherwise I'm leaning towards adding language support, and input remapping.

If there's enough interest, I might look into adding a puzzle editor and a way to play user generated levels, but that would likely be a further goal.

Thanks for the support so far.

PS: I was aiming to have this update done at the start of the Spring Sale, but life got in the way. It's on sale for less than a dollar for the next 24 hours or so, if you know anyone who might enjoy it, I'd appreciate you sharing it with those people.