Trailer kit · Prototype v0.30 · Android

Mechanical Workshop

Build→Connect→Press play→Watch the machine work

Both cuts are made from real gameplay. Godot 4.7.2 Movie Maker recorded the game frame by frame, with its own sound. The game files were not changed. A small recording script ran in a separate copy of the project and drove the game with ordinary mouse input.

Hero: L30 The Great Workshop 16 parts · 4 ropes and belts Run 12.3 s · 3 ★ 1920×1080 · 30 fps · game audio

The two cuts

16:9 trailer20.6 s · 1920×1080 · H.264 + AAC

9:16 Shorts / Reels / TikTok18.1 s · 1080×1920

16:9 shot list 20.6 s

Source times refer to the raw captures: l30 is Level 30, built live and then run; l20 is a Level 20 run; ws is the Workshop running a copy of the Crazy Machine demo.

Trailer	Shot	Source	Text overlay
0.00–1.80	Hook. Close-up of the L20 power section, cropped and scaled 1.5×: the motor, the big gear, and the belt to the 120 RPM generator, all turning. No menus.	l20 4.0–5.8	Can you build a machine that actually works?
1.80–2.80	A small gear is dragged out of the tray and snaps onto the master generator's gear shaft.	l30 3.4–4.4	Build
2.80–3.60	A pulley is dropped onto the left pulley mount.	l30 8.1–8.9	Build
3.60–4.50	BELT tool: tap the LINE DRIVE, tap the new gear, then "Belt connected."1.33×	l30 6.0–7.2	Connect
4.50–5.50	ROPE tool: from the gate hook, over the fixed pulley and your pulley, down to the weight.2×	l30 12.6–14.6	Connect
5.50–6.20	Tap PLAY.	l30 15.7–16.4	Press play
6.20–12.50	The star shot. The full 12.3 s run of L30 in one uncut take. The motor drives the gears and belt; the tower hatch drops its weight; the 9 kg gate lifts; the fan pushes the ball; the ball runs down the chute into the dominoes; the crate falls onto the spring and is launched; the CRATE switch starts the LINE DRIVE, which spins the master generator.2×	l30 16.4–29.0	Watch it work (6.7–8.5, over the tray)
12.50–14.50	Finale. The dark hall comes alive: the MAIN LIGHT turns on, then the hall lamps one after another. Real time.	l30 29.0–31.0	none: the lamps carry it
14.50–15.80	The game's own MACHINE COMPLETE panel: 3 stars, 12.3 s, 16 parts.	l30 34.0–35.3	none (the panel is the title)
15.80–18.20	WORKSHOP sandbox: the Crazy Machine copy runs. The ∞ tray and both lamps are on screen.	ws 2.1–4.5	Build your own machines Workshop sandbox · every part, unlimited
18.20–20.60	End card over a blurred frame of the lit finale, with a slow 2.5 % push-in. Sound: the game's own lamp click and lamp-on.	card	Mechanical Workshop Physics Puzzle & Machine Building Game · Android

9:16 shot list 18.1 s

The full 16:9 frame sits centred at 1080×608 and is never cropped. Above and below it, a blurred, darkened copy of the same shot fills the frame, edged by thin brass rules. Captions sit in the top band. The secondary line sits in the bottom band, clear of the Shorts and Reels buttons.

Trailer	Shot	Source	Caption
0.00–2.00	Hook. L20 power-section close-up.	l20 4.0–6.0	I built a machine…
2.00–3.00	Gear dragged in and snapped onto the shaft.	l30 3.4–4.4	Build
3.00–3.90	Belt connected.1.33×	l30 6.0–7.2	Connect
3.90–4.90	Rope routed over two pulleys.2×	l30 12.6–14.6	Connect
4.90–5.60	Tap PLAY.	l30 15.7–16.4	Press play
5.60–11.90	Full uncut run.2×	l30 16.4–29.0	Level 30 · The Great Workshop bottom: 16 parts · 5 stages / one button
11.90–14.40	The lamps come on.	l30 29.0–31.5	…and it actually worked.
14.40–15.70	MACHINE COMPLETE, 3 stars.	l30 34.0–35.3	(caption holds)
15.70–18.10	Vertical end card.	card	Mechanical Workshop · Android

Hook change. I split your line in two. "I built a machine…" opens the video, and "…and it actually worked." lands exactly when the lamps come on. The open sentence gives viewers a reason to stay to the end, which matters most on Shorts. A bottom-band line, "16 parts · 5 stages · one button", tells viewers what they are watching while the machine runs.

Stills

Level 20 power section: motor, large gear, belt and generator at 120 RPM — **Hook.** L20 power section in motion.

Small gear placed on the master generator shaft in Level 30 — **Build.** Gear snaps onto the master generator.

Belt connected from the line drive to the gear — **Connect.** Belt from the LINE DRIVE.

Rope routed from the heavy gate over two pulleys to a weight — **Connect.** Rope over two pulleys.

Level 30 running: ball on the route towards the dominoes — **Run.** Ball route, before the lights.

Level 30 finale with the main light and hall lamps on — **Finale.** Hall lamps lit; the strongest single frame.

Machine complete panel with three stars — **Payoff.** MACHINE COMPLETE, 3 stars.

Workshop sandbox running the Crazy Machine copy — **Sandbox.** Crazy Machine copy running.

What to record, and why

L30 The Great Workshop is the hero. It has all five stations, from POWER to FINAL ACTIVATION, with gears, belts, two ropes, pulleys, weights, a fan, the ball, dominoes, the crate, a spring, a switch, the LINE DRIVE and the generator. The room stays dark until the end, then the lamps light one by one. No other level has that payoff.
L20 Master Contraption II gives the hook close-up. Its power section has the biggest gears and a visible belt, close together, and they turn from the first frame.
Workshop → Demo Machines → Crazy Machine, opened with EDIT COPY, not PLAY DEMO. That way the ∞ tray and the SAVE button are on screen, which reads as "your own sandbox".
Backups: L28 Factory Control (the room lights up system by system) and L21 Double Drive (one motor, a drawbridge, a single strong lamp).

Strongest moments

L30 lamps: the dark hall lighting up lamp by lamp. This is the emotional peak, so show it in real time.
Gear snap: a dragged gear clicks into mesh with a brass flash. It shows the main idea in one second.
Crate launch: the spring throws the crate up to the CRATE LIFT switch, and the LINE DRIVE starts.
9 kg gate lift: two weights fall on ropes and the gate rises slowly and heavily.
MACHINE COMPLETE with all three stars ticking in.

Audio

All sound in both cuts is the game's own. It was recorded with the picture: motor start, gear layer, belt, pulley, rope creak, impacts, spring, switch click, lamp buzz and level complete. The end card uses the game's own lamp_click, lamp_on and room tone. The hook adds the game's motor_start at 55 %.
In the 2× sections the sound is sped up with a time-stretch, so pitch stays natural.
No music is used. If you add some, look for a minimal, slow industrial pulse around 90–100 BPM. Use a muted kick and low synth bass, with metallic percussion that leaves room for the gear clicks. Bring in one warm pad when the lamps turn on. Use only a track you own or have licensed.

Production notes

On screen, the gear, pulley, weight, belt and rope are placed live with real mouse input. The other 11 parts of the 16-part machine were already in place when recording started. The run is the game's own known 3-star solution, and the result it shows (12.3 s, 3 stars) is genuine.
The soft ring that shows where the finger is was drawn by the recording script. It is not part of the game UI. Mobile trailers normally show a touch marker like this.
The run is shown at 2×. It is honest editing, but if store rules or your own preference call for it, add a small "2× SPEED" tag in the corner. Do not slow the lamp finale down.
Fonts: Inter Display (OFL) for the overlays. Colours come from scripts/visual/palette.gd: BRASS_LIGHT, LAMP_ON and STEEL_DARKEST.
Google Play rules: if this goes on the store listing, store pages usually crop or play the video at 16:9. The end card's "ANDROID" text is not the official Google Play badge. Use the official badge only under Google's badge guidelines.