Aim a pulsar so the line where waves collide crosses every star
Two pulsars, one field of stars, and a single question: where will the waves meet?
In this game, one violet pulsar is fixed in place and the cyan pulsar is yours to move. Drag it across the field, then tap FIRE. Both pulsars send out expanding rings at the same moment, and where the violet and cyan waves collide, they trace a line. Your goal is to place the cyan pulsar so that this collision line passes through every marked star.
It sounds simple at first. Then you start to realise how small moves change where the line falls. Shift the pulsar a little to one side and the meeting line tilts. Bring it closer and the line moves too. Each attempt teaches you more about how the two waves behave, and finding the one spot that catches every star is very satisfying.
Game has 15 levels, and they get harder as you go. The number of stars grows, so a single line has to reach more of them. Each star's hit ring also shrinks, so your placement needs to be more and more precise.
From level 9, the fixed pulsar fires late. Because the two waves no longer start together, the collision line stops being straight and bends into a curve. Positions that would have worked before now miss, and you have to think about timing as well as distance to plan a curve that sweeps through every star.
If you enjoy puzzles where you watch, adjust and try again until the solution finally clicks, drag the cyan pulsar into place and fire.