Xbox 1 and Win 10 pose serious problems for ME1. There are some good profile sites to program your controller but the trick is to get the Game to recognize your controller. NexusMods has an ME1Controller bypass that you can download and install that's fairly simple. It states right in the Mods description that It'll Break certain aspects of your game.
One guy, Moonshine, work's right now on controller support for all tree Mass Effect episodes. Mass Effect 2 and Mass Effect 3 allready allmost done! Allmost all works, even powerwheel in both games and in ME2 a rumble! Mass Effect 1 is in process and not avalaible for now. But Moonshine tells he complete all tree. Its not controller emulation or other bull., It is restoring native.
Those aspects pertain to the level-up screen. Half of the screen is blank and it's the half that you'd need to see in order to make your level-up choices.
Your other choice is to try and play with kb/m. I brought this oversight to the attention of the folks at EA and Bioware and the overall reaction from them was 'Oh-Well!'