Spire Blast by Orbital Knight is an Apple Arcade game of color matching. There is a hollow tower with walls (either round or square walls) made of colored blocks. You have a certain number of shots to knock out bricks (and all contiguous bricks of the same color) and eventually tear the whole tower down as bricks and walls fall with gravity and physics effects.

You collect coins which are used to buy boosters that carry over from level to level until they are used up. Boosters like knock out all bricks of the same color even if non-contiguous or knock out all bricks in a row. Stars are also collected (one to three stars per level depending on number of shots it takes to finish) and 20 stars is a special chest with three random rewards.

There are also complications. A dragon that you have to feed with blocks. Locked blocks that you have to unlock by knocking out an adjacent block. Blocks that take two hits, though seems to be the exact same behavior as locked blocks.

The game has nice graphics and sounds. It's fairly simple so I guess for a younger audience. It does feel like a free-to-play game without the FTP purchase mechanisms.