Start on the ground. Build all the way to space!
Stack or flip, then add one more floor in this two-button building game!

Read the columns on the next floor and decide whether to place it as shown or flip it left to right. Watch the city fall away, rise through the clouds, and keep building toward the stars!

【Two buttons, split-second decisions】
The controls are simple, but climbing higher takes quicker thinking. Read the next floor and place it correctly before time runs out. Keep your streak going—your next decision could take you one floor higher!

【Turn up the excitement with golden Fever】
Successful stacks fill the Fever gauge. When your building glows gold, each successful placement earns Jab, the in-game currency. Focus on the next floor and make the most of every Fever!

【25 characters with abilities to suit your play】
Meet builders, a robot, a cat, an alien technician, and more! Choose from 25 characters with different abilities, including time recovery, hammer supplies, and Fever or Jab bonuses. Spend the Jab you collect to upgrade characters to level 19 and prepare for a higher score.

【A hammer can save your next attempt】
A hammer you hold can protect you when you place a floor incorrectly. Watch your time and remaining hammers as you climb. Meet the requirements to unlock floor jumps, or spend Jab on a continue and take another shot at your best height.

【Daily missions, weekly goals】
Take on daily and weekly missions and collect check-in rewards. Earn rewards for stacking, flipping, triggering Fever, and more. Claim all 7 weekly mission rewards to earn a choice reward from 4 exclusive characters. If no further character choice can be awarded, or you already own all 4, you receive Jab instead.

【Build it your way】
Personalize your construction site with 10 building skins and 3 button styles. Choose backgrounds for the ground, sky, and space stages, too. Raise your best score to unlock new background stages and keep climbing with your favorite character!

【Beat your best and climb the online leaderboard】
Aim one floor beyond your last record! Check your best height and compare it with other players. Link your account to enter your own scores on the online leaderboard. There is always a new height to aim for.

A small construction site on a portrait screen. A challenge that reaches for space.
Place your first floor today. How high will you build?

【Before you play】
• An internet connection is required.
• Contains ads and in-app purchases.
• Passes are consumable items that refill your play count.
• In-app purchases and submitting your own leaderboard scores require a linked platform account.

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