How to play
Tap an arrow and it slides off the board in the direction it points. If another arrow is in the way, it is stuck — the red path shows you what is blocking it, so try clearing that arrow first. Clear them all and you win. No timer, no lives, just thinking.
Pick a level
Advanced — thin trains
Arrows become little trains of thin squares. Tap any square of a train to slide the whole train out — its head still needs a clear path to the edge.