1) yeah
2) i got this complaint from a lot of people
the phone ringing sound is apart of the music that plays in the background.
it sounded like a nice addition when i was making and listening to it by itself but during it, i didnt notice how it could make people feel like theres some other mechanic in-game
3) i was recently informed that the ui shifts weirdly if you full screen the game
the position of it would change depending on the window's height and width. i was playing in a 1280 by 720 window, meanwhile some computers, when full screened, can exceed that and may mess with it a little. if this happened by some other mean, then oops, i dont know what i did wrong!!
im glad you still found some enjoyment in it tho :)