I love how polished the game is and the quality of life elements like the chittering blocks. I only felt that when I got down to 3 blocks left the game became almost too easy for me and it didn't feel like it was getting more difficult. As long as I had a 2 stack and a single block I could easily make a stair formation, an upside-down L formation and a 3 block tower really easily and that's all that 3 blocks can make and will be required. This lead to a certain sense of boredom because even though I couldn't collect all the coins I could easily pass the wall just collecting 1 coin and speed the pace up so I could pass double the walls 4 blocks could and still end up with the same number of coins.
I feel (at least with 3 blocks) there should clear difficulty increases to make it less monotonous.