Regarding the Controller: Thanks for the feedback, kinda hard to fix this tho. I will do my best in a future update.
'HUD is probably not implemented yet,' - Correct. I want the game to be playable without any kind of HUD, but it is planned to be toggleable in the options, once those are implemented.
'there is lasting stuttering when you walk a staircase and even when the staircase is "exited"' - It is on my List ;)
Seems like the game accumulated a lot of small 'hickups', will be patched once the items are implemented accordingly.
Thanks for playing.