Fix last standing player suicide

Was colliding with the last tile put after the end of the round, because
this tile was added while the player was still colliding.

Player.gd

@@ -92,7 +92,7 @@ func _on_tween_completed(_o, key):
 		move()
 
 func _on_crash(body):
-	if landed:
+	if landed and running:
 		stop()
 		# TODO : use enum for blocks
 		grid.set_cell(posix, posiy, 2)