Design the Perfect Simulator UI for Your Roblox Game
A simulator HUD needs click counters, rebirth badges, pet counts, and currency labels - all readable on mobile while the player spams clicks.
Simulator games live or die by their HUD. Players tap a button hundreds of times a minute, so the counter has to update instantly, the rebirth badge has to stay visible, and the whole layout has to survive a phone screen held in one hand. This guide covers the layout, the feedback loops, and the Luau wiring that makes a simulator HUD feel responsive.
Design requirements
- • Large, tappable button anchored to a thumb-friendly zone
- • Currency counters that update every click without lag
- • Pet and equipped-item icons in a compact horizontal strip
- • Rebirth badge showing current tier and next threshold
- • Tweened pop numbers that confirm each click
- • Mobile-safe layout that avoids the top notch and bottom bar
Step-by-step tutorial
- 1
Anchor the main click button
Place a large TextButton in the bottom-right thumb zone, sized with Scale so it scales across devices. Give it a UICorner and a subtle UIGradient so it reads as tappable.
- 2
Add currency labels
Stack your counters (coins, gems, clicks) with a UIListLayout anchored to the top-left. Use a monospace font for the digits so they do not jitter as they change.
- 3
Build the rebirth panel
Show the current rebirth count, the multiplier it grants, and the cost of the next rebirth. Disable the rebirth button when the player cannot afford it.
- 4
Add the pet strip
Lay out equipped pets in a horizontal ScrollingFrame with UIGridLayout. Each slot shows the pet icon and a small rarity border.
- 5
Wire the click event
Fire a RemoteEvent to the server for the real currency update, and update the HUD locally for instant feedback. Use TweenService for the pop number on each click.
- 6
Test on mobile
Open the editor's mobile preview and confirm the button stays in the thumb zone, counters do not overflow, and pets wrap cleanly on a 375px width.
Why simulator HUDs need Scale over Offset
Simulator players are almost always on phones, and phone aspect ratios range from 16:9 to 21:9. If you size your click button with Offset (pixel values), it will look tiny on a 6.7-inch phone and huge on a 5.4-inch one. Scale sizes the button as a percentage of the screen, so it stays proportional. Anchor the button to the bottom-center or bottom-right, set its AnchorPoint to (0.5, 1), and use a Size like {0.4, 0, 0.12, 0}. The button will land in the thumb zone on every device.
Making clicks feel instant
The single biggest UX mistake in simulator HUDs is waiting for the server before updating the counter. Network round-trip adds 50 to 200 milliseconds of lag, and at 10 clicks per second that means the counter is always behind the player's finger. The fix is optimistic updates: increment the local counter immediately, fire the RemoteEvent to the server, and let the server reconcile. If the server rejects a click (cooldown, cheat detection), it sends a correction and you snap the counter back. The player never sees lag.
Rebirth UI patterns that convert
Rebirth is your main monetization lever, so the rebirth panel has to sell it. Show the current rebirth count, the permanent multiplier it grants, and the next reward threshold. Use a progress bar that fills as the player approaches the next rebirth cost. When they can afford it, pulse the rebirth button with a TweenService scale animation. Do not hide the rebirth panel behind a menu - put a compact badge in the HUD that opens the full panel on tap. Players who see the rebirth progress constantly are more likely to grind for it.
Pet strips and inventory previews
Equipped pets are status symbols in simulator games, so they belong in the HUD, not buried in a menu. A horizontal strip of 3 to 5 slots along the top or side of the screen shows what the player has equipped. Each slot is a small ImageLabel with a rarity-colored UICorner border. If the player has more pets than slots, show a '+N more' tile that opens the full inventory. Use UIGridLayout with a fixed cell size and padding so the strip stays neat on any screen width.
Design tips
- • Use TweenService for pop numbers - a 0.2-second scale-up and fade makes each click feel rewarding.
- • Keep the click button at least 80x80 logical pixels to meet Apple/Google touch-target guidance.
- • Animate the rebirth button with a subtle pulse when the player can afford it.
- • Test your HUD on the slowest device you can find - simulator players are often on low-end phones.
Related templates
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