👆 Planet Builder Idle

<p>Planet Builder Idle drops you into the cold edge of empty space and dares you to build the most ambitious matter empire on the web. It all starts with a single tap on the core: each press mints a little Matter, and Clump matter until a barren rock blooms into a living world.</p><p>Spend what you earn to hire helpers like Little Engineers, Busy Engineers and eventually Cosmic Engineers. They keep working even after you stop tapping, so your Matter ticks up every single second — close the tab and you'll come back to a tidy pile of offline earnings. Stack boosts such as the "core Festival" to multiply everything, then chase achievements that hand you a permanent edge.</p><p>When growth slows, ascend to bank Cosmic Dust: each one you hold quietly supercharges all future runs, turning a slow start into an avalanche. It is built to play itself while you watch the counters climb, and it runs instantly in your browser on phone, tablet or desktop — no download, no sign-up. Fire up Planet Builder Idle, find your rhythm, and see how big an empire matter can buy.</p>

How to play

• Tap or click the core (or press Space) to earn your first Matter.
• Open the Buildings tab and buy Little Engineers to start earning Matter automatically.
• Reinvest into stronger helpers like Turbo Engineers and Cosmic Engineers as costs climb.
• Grab Boosts and unlock achievements to multiply how much Matter you make.
• When progress slows, hit Ascend to bank Cosmic Dust for a permanent boost, then climb faster.

Controls

Tap or click the subject to earn (Space or Enter also taps). Press number keys 1–9 to buy buildings, P to ascend and M to mute. Fully playable with touch on mobile.

Features

• Most ambitious matter theme set in the cold edge of empty space
• Five upgradeable helpers from Little Engineers to Cosmic Engineers, each with its own boosts
• Idle income that keeps earning while the tab is closed, with capped offline catch-up
• Prestige system: ascend to bank Cosmic Dust for a permanent, stacking multiplier
• Achievements, satisfying tap combos, sound effects and an automatic local save

FAQ