One Line (itch) (MatheaMatheaMatheaMathea, SomeoneWeird008, WizardKitten)

One Line is a game where you complete levels by drawing lines to get past obstacles. 

You move around using WASD and space.

To draw lines use the cursor and left click.

Switch between line types by using 1,2,3,4.

Also you can quickly restart a level by clicking the R key.

Warning that there is a little blood in the game.