1. There needs to be a way to drop the block into place rather than having to hold down and wait.
Noted 2. I couldn't understand the logic behind when squares were uncovered and when they weren't. Sometimes they would clear, other times they would crack, other times they would become an "X". Seemed arbitrary.
OK, this doesn't appear to be as self explanatory as I had hoped, so I will explain here:
***How the game works***
All shapes have a different color. All puzzles contain one of more of those colors.
1. If a shape lands on and covers a square that is of the same color, that square on the puzzle side is broken (revealed).
2. If a shape lands on and covers a square that is of a different color, that square on the puzzle side is only cracked. A cracked square can later be broken by ANY color, you just have to set another shape in it's place (during the second round if you play it).
3. During the second round of a level: If a shape lands on and covers a square that is of the same color or covers a cracked square (of any color), that square on the puzzle side is broken (revealed).
4. However, During the second round of a level: If a shape lands on and covers a square that is of a different color (but not cracked), that square on the puzzle side is 'X'd out. An 'X'd out square can no longer be revealed (because there is no third round).
Hope this helps.