A SMALL CHANGE. A DIFFERENT FUTURE.
An asteroid. A few interceptors. One blue planet. Plan a tiny nudge and give Earth a little breathing room.
MISSION 01 / 08
Space: launch / pause · R: reset
Adjust the nudge time and strength. Pass through the blue exit without crossing Earth or any amber relay.
FLIGHT DIRECTOR'S FIELD GUIDE
Choose an interception turn and a vertical strength. Negative values push north (up); positive values push south (down). A zero does nothing. The asteroid keeps its new drift after each nudge.
The dotted line predicts your route. Keep the entire asteroid outside Earth's safety ring and every amber relay bar, then fit it through the blue exit. Stay within the fuel budget. A second interceptor must fire after the first.
Each successful route earns a mission badge. Use less fuel for more stars: three stars for using at most half the budget, two for leaving any fuel, one for using it all. Hints are free and do not reduce stars.
Controls: Tab to every control; arrow keys adjust sliders. Space launches or pauses; R resets when a slider is not focused. A simulation pauses when you leave the tab. On phones, tap the sliders and buttons.
This is a fictional, simplified planning game, inspired by Hera's 2026 asteroid approach. It uses linear drift rather than real orbital mechanics.
ORIGINAL GAME / MIT LICENSE
Original code, missions and game design. No upstream code or art copied.
GitHub concept-research reference: Asteroid Impact Simulator (MIT; 0 stars observed 29 Oct 2026). It was not selected for adaptation: last maintained November 2025 and below the popularity preference.
Timely inspiration: ESA's 27 October 2026 Hera update. Independent game, no agency affiliation.
Earth, asteroid and starfield: generated with a GPT image model for this game, optimized and bundled locally. Your mission badges stay on this device when storage is available.
MIT license & asset attribution