House of ! Blocks
From the Super Mario Wiki
House of ! Blocks is a course which appears in the Story Mode of Super Mario Maker 2. It is Partrick's first job, and it is set in the sky theme and the Super Mario 3D World style. The course has a difficulty rating of 1/4 stars. Completing this course will make a ? Block appear on the second floor of Peach's Castle.
The course starts out with a ! Block leading Mario up to a Warp Pipe which takes him to vertical area. At the bottom, he will find a ? Block with a Super Mushroom inside and another ! Block which takes him upward. The next ! Block creates a bridge allowing Mario to reach a ? Block with a coin inside and yet another ! Block which Mario can ground pound on to reach a long platform of Cloud Blocks. There are more ! Blocks which Mario must also ground pound on to get higher while dodging Bullet Bills being fired out of Bill Blasters.
Mario will then reach the Checkpoint Flag, as well as another ? Block with another Super Mushroom. As Mario continues heading to the top, he will find more ! Blocks, Bill Blasters, and coins. There is a green pipe which Red Koopa Troopas come out of. Mario can kick a Koopa Troopa's shell at a ! Block which takes him up to another Warp Pipe, which takes him to one last ! Block and the Goal Pole.
"We're in the market for a new house, and we need someone to inspect this place we found. Hit the ! Blocks and climb to the top to check it out. You can also tilt ↓ in midair to ground-pound to get all the blocks out instantly."
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