When you use scanline to change palette for border and screen part, positions are not aligned. Border is stretched vertically.

cartridge: https://tic.computer/play?cart=167
uncomment line 14
(saving cover fails too for this code)
yes, this is how it works
screen and border have two independent textures with the same height 136px
screen always keeps 240:136 aspect ratio, when the border stretches depending on the window size
I removed border texture, so, now TIC renders screen and border to one texture

fixed it here a4826af
closing
Most helpful comment
I removed border texture, so, now TIC renders screen and border to one texture
fixed it here a4826af
closing