Support

Build a cube stack so that its front and side projections both match the target.

How to play

Add a block

Tap the base to place a block immediately. Tap the surface of an existing block and hold briefly to add a block next to it.

Remove a block

Double-tap a block to remove it.

Rotate and zoom

Drag with one finger to rotate the view. Pinch with two fingers to zoom.

Precise alignment

In levels 1–30, use the Front and Side buttons to snap the camera so the projection lines up exactly. In levels 31–80 the two projections are shown as fixed flat grids at the top of the screen.

Goal

Make both the front and the side projection match their targets at the same time. Different 3D arrangements can satisfy the same pair of projections — any of them counts as a solution.

Frequently asked questions

How many levels are there?

80 levels across 16 difficulty tiers. Tiers get harder every 5 levels, and levels 51–80 use a larger 6×6×6 space.

Why can't I use more blocks?

From level 6 onward the game limits you to the minimum number of blocks needed to solve the puzzle. This is what makes the challenge about spatial reasoning rather than trial and error.

Why did the red error highlights disappear?

Levels 1–20 highlight mismatched projections in red. From level 21 the game stops showing red hints so you can reason it out yourself.

I'm stuck. Can I get a hint?

Yes. The hint button suggests either a block to add or a block to remove. Levels 1–10 give 1 hint, 11–20 give 2, and 21–80 give 3. Resetting the board does not restore used hints.

How do I unlock later levels?

Level 1 is open from the start. Each following level unlocks after you complete the one before it. Completed levels can be replayed at any time.

My progress disappeared.

Progress is stored locally on your device only. Deleting and reinstalling the app resets all progress. There is no cloud save and no account, so progress cannot be transferred between devices.

Does the app work offline?

Yes. The app never needs an internet connection and makes no network requests.

支持

搭建立方体，让正面与侧面投影同时匹配目标。

玩法说明

添加方块

轻点底座立即添加方块；轻点已有方块的表面并稍作停留，可添加相邻方块。

移除方块

双击方块即可移除。

旋转与缩放

单指拖动旋转视角，双指捏合缩放。

精确对齐

第 1–30 关可用「正面」「侧面」按钮把相机对齐到投影方向。第 31–80 关两面投影固定显示在屏幕上方，呈平面网格。

通关条件

让正面与侧面投影同时与目标重合。不同的三维摆法可能对应同一组投影，任意一种都算通关。

常见问题

一共有多少关？

80 关，分 16 个难度档，每 5 关提升一档。第 51–80 关使用更大的 6×6×6 空间。

为什么不能放更多方块？

从第 6 关起，方块上限等于完成该关所需的最少数量。这正是挑战来自空间推理、而不是反复试错的原因。

红色的错误提示怎么不见了？

第 1–20 关会用红色标出不匹配的投影。第 21 关起不再显示红色提示，由你自己推理。

卡住了，能用提示吗？

可以。提示按钮会指出建议添加的位置或需要移除的方块。第 1–10 关每关 1 次，11–20 关 2 次，21–80 关 3 次。重置棋盘不会补回已用次数。

后面的关卡怎么解锁？

第 1 关开局即开放，之后每关需先完成前一关才解锁。已解锁的关卡可反复游玩。

我的进度不见了。

进度仅保存在你的设备本地。删除并重装应用会清空全部进度。没有云存档、也没有账号，因此进度无法在设备之间转移。

可以离线玩吗？

可以。本应用无需联网，也不发起任何网络请求。