I don't understand, why is peer needed. Is it useful thing?

im playing with a controller - more on that later - why do windows suddenly stop expanding when i near the edge, locking me into a tiny window thats teeming with enemies or bullets suddenly? the windows not near the edge of the screen or anything - what do the perks do for killing bosses? i had one that looked like an eye but no idea what it did. theres no text or information on what they do, youre buying blind - why all of a sudden did a yellow smiling face and hands appear on my screen? another boss? ...

So the game "works." But there's a big black box on my desktop. How do I fix this?

I have fake windows off, limited FPS to 60, VSync on, turned off any effects from enemies. What else can I do?

I dont know how this was activated, if this is just how :) is now or whats happening, but I can collect stars multiple times. So far I've milked one star spawn for 5 stars.