Help with Retroplayer

Hello everyone!
iam pretty new to Kodi but i love it so far, i bought a pc Asrock ion 3d 152d with Kodi on autostart. When i press the remote ON button it start directly and i like that becorse i will connect this to my tv later when i got eveything to work as i planned, All my movies are on place and work great. A friend told me that i could use Kodi as a NES player also so i started to google it, found this nice site and tryed to read what i need to do to make it work but i just dont get it,
So from now i need to ask and i need pretty mutch guidance to make this work and i think this is the right place to do it,

I started to read about retroplayer and found some NES files on another site that i downloaded .nes files.
Continued to try to install
Windows: KodiSetup-20170325-72fb982515-retroplayer-18alpha1.exe
It showed up on kodi as a addon but when i start it, it just wanna search for games on 3 sites even if i pointed where the games a located and where the covers are located when i installed retroplayer.
i gave that up for a minut and tryed another guid but it just dont make it work. now iam back at retroplayer and want this to work. i saw some screenshots where ppl have a own category as movies but named games, how can i get that?
As you see i downloaded Windows: KodiSetup-20170325-72fb982515-retroplayer-18alpha1.exe but when i check my System/SystemInfo/ i see that this kodi is installed on Ubuntu 14.0405 LTS (kernel: Linux 3.13.0-116-generic. I can start retroplayer as i described before.

What i want is a layout as my movies are, so i can see covers and info about the games and just press to start exaclty as the movies are shown. info aint important but i wanna see the covers.
is this even possible?

Second problem is that my computer dont have a bluetooth connection so i bought a BT dongle that i will connect to my computer so i can connect my BT nintendo control. Will that work as i want straight ahead without any problem,

Could someone please help me out? Help me here or over teamspeak/skype.