How to build a stable tower in Totally Safe Moon Project comes down to one repeatable loop: grab a prop with the gravity gun, climb up your stack with it in hand, and drop it where the weight sits flat. Nothing in the tower is fastened or glued — every block you place stays up through friction and balance alone, so placement is what decides whether the stack holds.
Totally Safe Moon Project How to Build a Stable Tower: the carry loop
- Aim at the prop and pick it up. The on-screen prompt reads "Pick Up Object" on the left mouse button, and the object floats in front of you.
- Carry it up. The gravity gun holds the prop at a fixed distance, so the higher you climb, the more of the stack you have to balance around.
- Drop it in place. Press Q ("Drop Object") and the prop settles onto whatever is below it. A prop that lands on an edge leans, and a leaning block drags its neighbours over with it.
- Repeat upward. The tower is the sum of those placements, so the same three steps decide everything.
The prompts themselves, plus the rotate and throw modes, are covered in the gravity gun guide.
What you can stack
The building blocks are the town's own props, and they are all the same kind of mass — free physics with nothing holding them together:
- Houses, including one that can be attached to a tree
- Cars, taxis and vans
- A yellow school bus
- A garbage truck and a fire truck
- Trees
- Wooden crates
- Fences
- Shipping containers
- A trampoline, a boombox and the Blessed Statue
- Clouds, which the gravity gun can pick up like anything else
The tower is deliberately unsafe: nothing holds the stack together except balance, and a build like that would not pass any kind of safety inspection. Several of these props double as collectibles, so a stack can be worth more than its height — the collectibles guide lists them.
Where the height comes from
Two readouts on screen track the climb. The vertical meter on the left starts at "0m", carries a marker for every height goal and is topped with a moon instead of a number, so the ladder is meant to end at the Moon. The "NEXT GOAL" banner in the top-left names the checkpoint you are working towards, and it has been seen pointing at 25m, 65m, 500m and 825m.
The full list of goals and what each one pays out is in the height goals guide.
What knocks the tower over
Two things interrupt a build, and neither is a puzzle you solve so much as a pile you put back together.
- Meteor showers. During Asteroid Rain, meteors streak across the sky and hit whatever you have built. A single shower has been reported to take out about a third of the whole tower, which is a rebuild rather than a repair.
- UFOs. Saucers hover over the streets with a green tractor beam that lifts props and players off the structure while you work on it.
The asteroid rain guide covers what the shower does and how to recover from it, and the UFO guide covers shooting the saucers down before they carry your props off.