Insert Coin Reset — Restart Page

Source Code

Copy the HTML, CSS or JavaScript you need for your project.

<!-- TB-2077 / Back to Top: insert before closing body (inside footer for TB-2083) -->
<button class="tb-btt bt2077" data-backtop type="button" aria-label="ゲームの始まり、ページの先頭へ戻る"><span class="game-light"></span><span class="game-word">RE<br>START</span><span class="game-tiny">BACK TO LEVEL 01</span></button>

/* TB-2077 : paste only this CSS into the target page. */
.tb-btt{border:0;cursor:pointer;z-index:30;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:transform .35s,opacity .3s,background .3s,color .3s,box-shadow .3s;pointer-events:none;opacity:0;visibility:hidden}.tb-btt.is-visible{pointer-events:auto;opacity:1;visibility:visible}.tb-btt:focus-visible{outline:3px solid #f9af4b;outline-offset:5px}.only-at-end{opacity:1;visibility:visible;pointer-events:auto}
@keyframes orbitTurn{to{transform:rotate(360deg)}}
.bt2077{position:fixed;left:22px;bottom:25px;width:116px;height:102px;border-radius:18px;background:#faea68;border:4px solid #22183c;color:#21133b;box-shadow:0 12px 0 #cc4692,0 23px 30px #0008;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:3px;transform-origin:bottom left}
.game-light{position:absolute;right:9px;top:9px;width:9px;height:9px;background:#ff5c8d;border-radius:50%;box-shadow:0 0 0 4px #fc8fab60;animation:blink 2.4s infinite}
.game-word{font-size:23px;line-height:.85;font-weight:950;letter-spacing:-.05em}
.game-tiny{font-size:7px;letter-spacing:.07em;font-weight:900;margin-top:6px}
@keyframes blink{50%{opacity:.25}}
.bt2077:hover{transform:translateY(-8px);background:#96fbe4;box-shadow:0 12px 0 #574bdb,0 23px 30px #0008}
@media (max-width:700px){.bt2077{width:97px;height:92px;left:12px;bottom:16px}.game-word{font-size:19px}}
@media(prefers-reduced-motion:reduce){.tb-btt,.tb-btt *{animation-duration:.01ms!important;transition-duration:.01ms!important}}

(()=>{'use strict';const control=document.querySelector('[data-backtop]');if(!control)return;const reduced=matchMedia('(prefers-reduced-motion: reduce)');const footer=control.classList.contains('only-at-end');let busy=false;function refresh(){busy=false;const max=Math.max(1,document.documentElement.scrollHeight-window.innerHeight);const p=Math.min(1,scrollY/max);document.documentElement.style.setProperty('--page-progress',p.toFixed(4));if(!footer){const show=scrollY>145;control.classList.toggle('is-visible',show);control.tabIndex=show?0:-1;control.setAttribute('aria-hidden',String(!show));}const number=document.querySelector('[data-progress-number]');if(number)number.textContent=Math.round(p*100)+'%';}function onscroll(){if(!busy){busy=true;requestAnimationFrame(refresh)}}addEventListener('scroll',onscroll,{passive:true});addEventListener('resize',onscroll,{passive:true});control.addEventListener('click',()=>window.scrollTo({top:0,behavior:reduced.matches?'instant':'smooth'}));refresh();})();

How to Use

Insert the HTML button near the end of body, load the CSS, and include JavaScript using defer. Test scrolling, returning to the top, and positioning on mobile.

Use Case

Games, pop-up exhibits and creative campaigns.

Technical Notes

Keep controls usable on touch devices. Test keyboard focus and reduced-motion preferences.

Mobile：Check tap target, visibility and positioning on small screens.

Browser：Designed for current Chrome, Edge, Firefox and Safari.

Reduced Motion：CSS animations respect the reduced-motion preference.