Crayon Cars

every line is a wall. last car riding wins.

swipe to turn a toy car that never stops, dragging a crayon line behind it; any line or the paper edge is out, and a rival who hits your line is a cut

Every car moves one square at a time and leaves a crayon line that stays solid. Touch any line or the edge of the paper and you are out. Swipe the way you want to go. Draw your line across a rival's road and it bonks into you: that is a cut. Last car riding wins the round; three crowns win the match.

Concepts: game-theory, partition, collisions.

An interactive you play with one thumb, on Wundr.