First Signal

You wake up in the dark. Your engineering memory is intact. Your understanding of the world is not.

Bring a quiet space center back to life, assemble your first rocket, and send a signal into the unknown.

First Signal is a spaceflight and visual-programming game. Build missions from blocks: respond to signals, read sensors, control engines, collect science, and decide what happens next. No typed code required.

Every flight teaches you something. New instruments reveal your surroundings. Better designs carry you farther. A small change to your program can turn a failed launch into a successful return.

• Build and refine your spacecraft.
• Automate missions with signals and sequences.
• Balance fuel, electricity, heat, and safe recovery.
• Progress from short hops to orbit, relay satellites, and lunar missions.

Early playtest

Progression, balance, and the interface are still being refined. Future updates may affect saves.

Play in a desktop browser with a keyboard and mouse. Fullscreen is recommended. Progress saves locally in your browser. You can back up your playthrough or transfer it to another browser using Menu → Save files & bug reports.

Feedback welcome: What felt confusing, repetitive, or especially satisfying? If something goes wrong, open Menu → Save files & bug reports, describe what happened, and export a bug report. It includes your saved mission and game version to help me investigate. Nothing is sent automatically—share the file with your report.