# 8-bit Difficulty Select

> A reusable 8-bit difficulty selector with Easy, Normal, Hard.

A shadcn/ui block from the [@8bitcn](https://www.8bitcn.com) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/8bitcn/difficulty-select).

- Page, with a live preview: https://shadcn.exchange/r/8bitcn/difficulty-select
- Screenshot: https://abzjhwgwpdpz7ua5.public.blob.vercel-storage.com/shots/8bitcn/difficulty-select-light-2fc9d03102d20dc8.png
- Registry item: https://www.8bitcn.com/r/difficulty-select.json
- Categories: gaming
- Listed: 2026-10-13, source last changed 2026-10-13

## Install

```bash
npx shadcn@latest add https://www.8bitcn.com/r/difficulty-select.json
```

Run it in a project that has shadcn/ui set up. It adds the files below and installs what they depend on.

## Dependencies

- Registry items: `button`, `card`

## Files

### `components/ui/8bit/blocks/difficulty-select.tsx`

```tsx
"use client";

import * as React from "react";

import { cn } from "@/lib/utils";

import { Button } from "@/components/ui/8bit/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/8bit/card";

export type Difficulty = "easy" | "normal" | "hard";

export interface DifficultySelectProps
  extends Omit<React.HTMLAttributes<HTMLDivElement>, "onChange"> {
  value?: Difficulty;
  defaultValue?: Difficulty;
  onChange?: (value: Difficulty) => void;
  title?: string;
  description?: string;
  vertical?: boolean;
}

export default function DifficultySelect({
  className,
  value,
  defaultValue = "normal",
  onChange,
  title = "Select Difficulty",
  description,
  vertical = true,
  ...props
}: DifficultySelectProps) {
  const isControlled = value !== undefined;
  const [internalValue, setInternalValue] =
    React.useState<Difficulty>(defaultValue);

  const selected = isControlled ? (value as Difficulty) : internalValue;

  const setSelected = React.useCallback(
    (next: Difficulty) => {
      if (!isControlled) setInternalValue(next);
      onChange?.(next);
    },
    [isControlled, onChange]
  );

  return (
    <Card className={cn(className)} {...props}>
      <CardHeader className="flex flex-col items-center justify-center gap-4">
        <CardTitle>{title}</CardTitle>
        {description ? <CardDescription>{description}</CardDescription> : null}
      </CardHeader>
      <CardContent>
        <div
          className={cn("gap-4", vertical ? "flex flex-col" : "flex flex-row")}
        >
          <Button
            className="flex items-center justify-center"
            variant={selected === "easy" ? "default" : "secondary"}
            onClick={() => setSelected("easy")}
          >
            EASY
          </Button>
          <Button
            className="flex items-center justify-center"
            variant={selected === "normal" ? "default" : "secondary"}
            onClick={() => setSelected("normal")}
          >
            NORMAL
          </Button>
          <Button
            className="flex items-center justify-center"
            variant={selected === "hard" ? "default" : "secondary"}
            onClick={() => setSelected("hard")}
          >
            HARD
          </Button>
        </div>
      </CardContent>
    </Card>
  );
}
```

### `components/ui/8bit/styles/retro.css`

```css
@import url("https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap");

.retro {
  font-family:
    "Press Start 2P",
    system-ui,
    -apple-system,
    sans-serif;
  line-height: 1.5;
  letter-spacing: 0.5px;
}

.pixelated {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}
```

### `components/ui/8bit/button.tsx`

```tsx
import { type VariantProps, cva } from "class-variance-authority";
import { Slot } from "radix-ui";
import type { ButtonHTMLAttributes, Ref } from "react";

import { Button as ShadcnButton } from "@/components/ui/button";
import { cn } from "@/lib/utils";

import "@/components/ui/8bit/styles/retro.css";

export const buttonVariants = cva("", {
  variants: {
    font: {
      normal: "",
      retro: "retro",
    },
    variant: {
      default: "bg-foreground",
      destructive: "bg-foreground",
      outline: "bg-foreground",
      secondary: "bg-secondary text-secondary-foreground hover:bg-secondary/80",
      ghost: "hover:bg-accent hover:text-accent-foreground",
      link: "text-primary underline-offset-4 hover:underline",
    },
    size: {
      default: "",
      sm: "",
      lg: "",
      icon: "",
    },
  },
  defaultVariants: {
    variant: "default",
    size: "default",
  },
});

export interface BitButtonProps
  extends ButtonHTMLAttributes<HTMLButtonElement>,
    VariantProps<typeof buttonVariants> {
  asChild?: boolean;
  ref?: Ref<HTMLButtonElement>;
}

interface ButtonDecorationsProps {
  size: BitButtonProps["size"];
  variant: BitButtonProps["variant"];
}

function ButtonDecorations({ size, variant }: ButtonDecorationsProps) {
  return (
    <span
      aria-hidden="true"
      className="pointer-events-none contents"
      data-slot="button-decorations"
    >
      {variant !== "ghost" && variant !== "link" && size !== "icon" && (
        <>
          {/* Pixelated border */}
          <span className="absolute -top-1.5 left-1.5 h-1.5 w-1/2 bg-foreground dark:bg-ring" />
          <span className="absolute -top-1.5 right-1.5 h-1.5 w-1/2 bg-foreground dark:bg-ring" />
          <span className="absolute -bottom-1.5 left-1.5 h-1.5 w-1/2 bg-foreground dark:bg-ring" />
          <span className="absolute -bottom-1.5 right-1.5 h-1.5 w-1/2 bg-foreground dark:bg-ring" />
          <span className="absolute top-0 left-0 size-1.5 bg-foreground dark:bg-ring" />
          <span className="absolute top-0 right-0 size-1.5 bg-foreground dark:bg-ring" />
          <span className="absolute bottom-0 left-0 size-1.5 bg-foreground dark:bg-ring" />
          <span className="absolute right-0 bottom-0 size-1.5 bg-foreground dark:bg-ring" />
          <span className="absolute top-1.5 -left-1.5 h-[calc(100%-12px)] w-1.5 bg-foreground dark:bg-ring" />
          <span className="absolute top-1.5 -right-1.5 h-[calc(100%-12px)] w-1.5 bg-foreground dark:bg-ring" />
          {variant !== "outline" && (
            <>
              {/* Top shadow */}
              <span className="absolute top-0 left-0 h-1.5 w-full bg-foreground/20" />
              <span className="absolute top-1.5 left-0 h-1.5 w-3 bg-foreground/20" />

              {/* Bottom shadow */}
              <span className="absolute bottom-0 left-0 h-1.5 w-full bg-foreground/20" />
              <span className="absolute right-0 bottom-1.5 h-1.5 w-3 bg-foreground/20" />
            </>
          )}
        </>
      )}

      {size === "icon" && (
        <>
          <span className="absolute top-0 left-0 h-[5px] w-full bg-foreground md:h-1.5 dark:bg-ring" />
          <span className="absolute bottom-0 h-[5px] w-full bg-foreground md:h-1.5 dark:bg-ring" />
          <span className="absolute top-1 -left-1 h-1/2 w-[5px] bg-foreground md:w-1.5 dark:bg-ring" />
          <span className="absolute bottom-1 -left-1 h-1/2 w-[5px] bg-foreground md:w-1.5 dark:bg-ring" />
          <span className="absolute top-1 -right-1 h-1/2 w-[5px] bg-foreground md:w-1.5 dark:bg-ring" />
          <span className="absolute -right-1 bottom-1 h-1/2 w-[5px] bg-foreground md:w-1.5 dark:bg-ring" />
        </>
      )}
    </span>
  );
}

function Button({
  asChild = false,
  children,
  className,
  font,
  size,
  variant,
  ...props
}: BitButtonProps) {
  const decorations = <ButtonDecorations size={size} variant={variant} />;

  return (
    <ShadcnButton
      {...props}
      className={cn(
        "rounded-none active:translate-y-1 transition-transform relative inline-flex items-center justify-center gap-1.5 border-none",
        size === "icon" && "mx-1 my-0",
        font !== "normal" && "retro",
        className
      )}
      size={size}
      variant={variant}
      asChild={asChild}
    >
      {asChild ? <Slot.Slottable>{children}</Slot.Slottable> : children}
      {decorations}
    </ShadcnButton>
  );
}

export { Button };
```

### `components/ui/8bit/card.tsx`

```tsx
import { type VariantProps, cva } from "class-variance-authority";

import { cn } from "@/lib/utils";

import {
  Card as ShadcnCard,
  CardAction as ShadcnCardAction,
  CardContent as ShadcnCardContent,
  CardDescription as ShadcnCardDescription,
  CardFooter as ShadcnCardFooter,
  CardHeader as ShadcnCardHeader,
  CardTitle as ShadcnCardTitle,
} from "@/components/ui/card";

import "@/components/ui/8bit/styles/retro.css";

export const cardVariants = cva("", {
  variants: {
    font: {
      normal: "",
      retro: "retro",
    },
  },
  defaultVariants: {
    font: "retro",
  },
});

export interface BitCardProps
  extends React.ComponentProps<"div">,
    VariantProps<typeof cardVariants> {
  asChild?: boolean;
}

function Card({ className, font, ...props }: BitCardProps) {
  return (
    <div
      className={cn(
        "relative bg-card text-card-foreground border-y-6 border-foreground dark:border-ring p-0!",
        className
      )}
    >
      <ShadcnCard
        {...props}
        className={cn(
          "rounded-none border-0 w-full! h-full flex flex-col bg-card text-card-foreground shadow-none",
          font !== "normal" && "retro",
          className
        )}
      />

      <div
        className={cn("absolute inset-0 border-x-6 -mx-1.5 border-inherit pointer-events-none")}
        aria-hidden="true"
      />
    </div>
  );
}

function CardHeader({ ...props }: BitCardProps) {
  const { className, font } = props;

  return (
    <ShadcnCardHeader
      className={cn(font !== "normal" && "retro", className)}
      {...props}
    />
  );
}

function CardTitle({ ...props }: BitCardProps) {
  const { className, font } = props;

  return (
    <ShadcnCardTitle
      className={cn(font !== "normal" && "retro", className)}
      {...props}
    />
  );
}

function CardDescription({ ...props }: BitCardProps) {
  const { className, font } = props;

  return (
    <ShadcnCardDescription
      className={cn(font !== "normal" && "retro", className)}
      {...props}
    />
  );
}

function CardAction({ ...props }: BitCardProps) {
  const { className, font } = props;

  return (
    <ShadcnCardAction
      className={cn(font !== "normal" && "retro", className)}
      {...props}
    />
  );
}

function CardContent({ ...props }: BitCardProps) {
  const { className, font } = props;

  return (
    <ShadcnCardContent
      className={cn("flex-1", font !== "normal" && "retro", className)}
      {...props}
    />
  );
}

function CardFooter({ ...props }: BitCardProps) {
  const { className, font } = props;

  return (
    <ShadcnCardFooter
      data-slot="card-footer"
      className={cn(font !== "normal" && "retro", className)}
      {...props}
    />
  );
}

export {
  Card,
  CardHeader,
  CardFooter,
  CardTitle,
  CardAction,
  CardDescription,
  CardContent,
};
```