A neon arrow puzzle. Untangle the order and send every arrow out. An arrow can only leave in the direction its head points.
This is the web version of the Android app, with levels 1 to 5 of the first stage playable. Tap an arrow to send it out in the direction it points.
An arrow can only leave in the direction its head points. If another arrow blocks the way, it stays put, so send the blocker out first and untangle the order. Send every arrow off the board to clear the level.
There are 15 stages of 20 levels each, 300 in total. Every level is machine-verified as solvable when it is generated, so progress comes from reading the order. Ice, keys and locks, wormhole portals and blocking cells pile on as you climb.