Haven't played it yet but the ufo doesn't seem to comforme to the 160 x 144 grid when it's tilted
Viewing post in Unidentifiable flyin' object 2: the Game jam comments
Thanks for the hint. Honestly most testing was made in an actual 160x144p sized window and therefore was (admittedly forced) inside the grid. Mostly overseen it then. Will resolve this issue once voting is over.