Echo is not a typical game. Every puzzle you solve triggers real computation on a cloud backend: SAT-based branch closure that proves whole regions of the search exhausted, plus a Firestore proof tree that never resets. That compute carries a monthly bill, and it grows as more people play.
If you would like the search to keep running, you can chip in. One coffee covers a chunk of the server bill, and all of it goes straight to infrastructure. No ads, no paywalls, no tracking. The game stays completely free either way.
100% goes to keeping the servers and the proof search alive. Thank you.