Cut a Gem Controls
Every input for Roblox PC, mobile, and console—menus, placement, negotiation, and camera.
Smooth controls separate players who optimize purity from players who fight the camera. Cut a Gem uses standard Roblox movement plus factory-specific menus for conveyors, grinders, totems, buyers, and the Store where codes redeem. This page lists inputs by platform so you can shop, place, and negotiate without closing menus accidentally.
If you are brand new, read Getting Started first for progression context. Pair this reference with How to Redeem Codes because the Store shortcut lives on the left HUD—not the top Roblox bar.
PC controls (keyboard and mouse)
| Action | Default input |
|---|---|
| Move | WASD |
| Jump | Space |
| Camera | Hold right mouse, drag |
| Zoom | Mouse wheel |
| Interact / select | Left click |
| Open Store (codes, shop) | Store icon left HUD |
| Place conveyor / build | Click tile after selecting piece |
| Rotate piece | R or on-screen rotate (patch dependent) |
| Open buyer negotiation | Click buyer NPC or prompt |
| Close menu | Esc or X button |
PC players excel at precise conveyor routing described in Conveyor Layout. Use free camera while planning paths before spending cash.
Mobile controls (touch)
| Action | Input |
|---|---|
| Move | Virtual joystick |
| Camera | Drag empty screen area |
| Interact | Tap target |
| Store / shop | Tap Store icon left side |
| Scroll shop / code box | Swipe inside modal only |
| Place build pieces | Tap grid after selecting item |
Mobile struggles with long Store scrolls—critical for code redemption. Disable keyboard autocorrect when typing 1MVISITS on the Codes Hub. Pinch zoom before fine totem placement covered in Totems Guide.
Console controls (gamepad)
| Action | Typical binding |
|---|---|
| Move | Left stick |
| Camera | Right stick |
| Interact | A / Cross |
| Menu back | B / Circle |
| Store | Left HUD highlight + confirm |
| Scroll panels | Right stick or bumpers |
Console players should slow camera during Buyer Negotiation timers—mis-clicks accept bad deals.
Menu map you must memorize
Left HUD Store — Geodes, grinders, bundles, promo code box at bottom after scroll. Same path for Codes rewards.
Build / conveyor palette — Opens when standing near editable tiles or via build button; exact label varies by patch noted in Latest Patch.
Buyer UI — Modal with offer, counter, patience meter. No combat inputs active—do not walk away mid-negotiation.
Totem inventory — Accessed from totem bag or build submenu; place before logging off for Offline Farming bonuses.
Rebirth shrine / menu — Late-game reset; confirm twice. See Rebirth Guide before using it.
Controls for advanced tasks
Purity checking — Inspect grinder output tooltip or gem preview before running to buyers. Cross-check with Purity Calculator on second device if needed.
Tier shopping — Open tier lists on wiki while in Store: Geodes, Grinders, Totems.
Layout edits mid-run — Pause conveyor purchases before deleting segments with gems in transit—layout guide covers safe edit order.
Accessibility and Roblox settings
Roblox client settings override sensitivity. Lower camera speed helps placement on small phones. Shift lock rarely helps factory games; free camera wins.
Report broken bindings after updates on Updates Hub—Gem Traders sometimes remaps build mode during events.
Controls vs scripts
Third-party scripts remap inputs or automate clicks—see Auto Farm Scripts and Keyless Hub for risk disclosure. Official controls are enough for full progression when paired with Increase Purity knowledge.
Quick troubleshooting
- Store will not open — Finish tutorial step blocking UI; rejoin server.
- Cannot place conveyor — Stand closer, check cash, verify tile unlocked.
- Negotiation stuck — Tap offer button again; avoid jump inputs.
- Code field missing — Scroll further inside Store, not Roblox settings.
Master these inputs once, then spend mental energy on economy—not fighting menus. Return to Guides Hub for strategy after controls feel invisible.
Frequently Asked Questions
Quick answers to the most common questions.
Where is the Store button in Cut a Gem?
Left side HUD storefront icon. Codes redeem inside Store after scrolling to the promo box—not the top Roblox menu.
How do I rotate conveyors on mobile?
Select the piece, then tap rotate if shown, or drag placement ghost until orientation snaps correctly on the grid.
Can I rebind Cut a Gem keys on PC?
Roblox handles movement; in-game build binds are fixed unless the developer adds remapping in a future patch.
Why can I not open buyers on console?
Face the buyer prompt and press interact. Ensure no other modal like Shop is still open in the background.
Do controls change after updates?
Sometimes build menus move. Check latest patch notes if a familiar button disappears after a Roblox update.