Space Hero Line
I know Space Hero Line is supposed to be just a casual game but this is frustratingly challenging. Too frustrating. I actually quit after trying to beat level 8 (out of 30!) for over 20 minutes. Mind you, all I had to do was stay alive for 20 seconds to beat it.
A mobile-like game where you control a line across space. Drag it away from obstacles or tap away to instantly teleport to a different location on screen. Collisions kill you. Simple, right? Then why is it so hard! Check out two of the early levels below.


Arrows and mouse pointers were edited in.
Okay, so far so good. It was pleasing. But suddenly, objects start creating other objects while you're playing the level. Those objects start going always towards random directions, so you can't even memorize where will be the best places to click. Some obstacles also react to the line, moving towards it.
See every tiny triangle in the next picture? They can go anywhere. There are always 6 of them on the screen. The big triangles travel back and forth from the middle of the screen towards the vertical borders. This is where I drew the line and quit the game.
Cool idea, frustrating execution. Check it out on Steam: https://store.steampowered.com/app/655120/Space_Hero_Line/