Ok I could have given 3 stars if not for some annoying faults:
3) If you press "again" quickly after losing, the sound effects overlap, which you are gonna do, cause waiting to hear the same sound effect over again each time is boring.
2) The laser hitbox doesn't always seems to work, so the best stragety seems to just gamble and cross the laser rather than have patience.
3)Also, the right click trick with the mouse works so you can just cheat.