Light-Time Courier
Fire light signals at moving planets, leading each target because light takes minutes to hours to arrive.
How to play
Click to fire a signal from the Sun; the planets keep orbiting while it travels, so aim ahead of the target. Light times are real — 8.3 min to Earth, 4.2 h to Neptune. Deliver all 5 messages to win; three lost signals bankrupt the courier.
Games run entirely in your browser — no sign-in, no data sent to a server.