using controller for a game where controller is not supported

Hello fellow steamgifters

I installed Amenesia A Dark Descent and found out after launching it that it does not have controller support. Is there a way to play it with the Controller. I have problem with my wrists that I can not keep them on the Keyboard and Mouse to play without getting into a lot of pain. That is why I have to use a controller (doesn't hurt my hands even after playing continuously for 3-4 hrs.) I don't know if it is very strange or not, but it is what it is.

I did hear about the Joy2Key thing, installed that also. but could not understand how to map the keys to the different buttons. Tried to watch tutorials, but couldn't find one that would show the easy way for it (I know I am gonna get a lot of heat for this that I am a noob at googling and stuff like that).

Please help. I promise to make a giveaway or two specifically for this thread, if and when the problem is solved for me and would invite only the people who would help (or atleast genuinely try to help). Don't have a lot of money, so can't promise huge giveaways, but will try to take a survey to find out which game to give away to give atleast everybody a chance.

Thanks a lot

EDIT

I am already letting you guys know what the giveaway will be for:

*2 Non BTA Gift link to Next Week's Humble Bundle Sale (The sale that will start on Thursday November 21).**

It is not much but this is what I can do right now. I will make the Private giveaway on Next Thursday and send all of you 11 people a link for the giveaway by adding you on steam (you can remove me from Friend list later if you want), so you can join. Also I will keep the giveaway open for atleast till Monday Morning so everyone has a chance to enter.

If someone new has suggestions, I will really appreciate it. But they will only be entered in the giveaway if atleast 6 of the mentioned 11 people say they can. These are the people who will be eligible for the giveaway:

BrandeX
Metalroed
DeltabladeX
Probrotector
Azrael360
Dysomniak
Incoq
Sinovera
Movac
Biodelic
Porosus