Orbit Sling

One burn, the moons' gravity, and a target far away — make the fuel last.

How to play

Aim a burn from your spacecraft, then let gravity fly it. Bend your path with slingshots off the moving moons to reach the target orbit while spending as little fuel as possible.

• Drag from the craft to aim a burn — longer drag means more delta-v (fuel)
• Release and Launch to hand control to gravity
• Use the moons' pull to curve your trajectory and gain free speed
• Reach the target orbit; reset and re-plan if you miss

Game modes

• Easy, Normal or Hard difficulty
• Daily course or Practice for fresh setups

Controls

• Desktop: press near the craft and drag to aim the burn, release, then click Launch
• Phone & tablet: drag from the craft with a finger, lift off, and tap Launch

Tips & strategy

• Time your pass so a moon's gravity is pulling you the way you want to go
• A small, well-aimed burn plus a slingshot beats a big, fuel-hungry one
• Plan the whole arc before launching — re-planning is free, wasted fuel isn't

What you'll learn

Orbit Sling teaches orbital navigation and gravity assists, balancing fuel against the pull of gravity to reach a destination.

• Skills: orbital mechanics, gravity, gravity assists, energy and fuel budgeting
• Best for: roughly grades 8–12 (ages 13+)
• For parents & teachers: introduces real space-flight ideas through play.

About Orbit Sling

Orbit Sling is a gravity-assist space-navigation puzzle about orbits and fuel budgets. It's an original, free browser game built in-house for PlayPendium.

A free, original browser game on PlayPendium — no download, no install. Browse all games →