Thank you so much for the feedback! If you like puzzles then please check out my game on my other page (I'll link on bottom).
I wanted to make the hidden tiles hard to find, and I really considered a screen-shake for them. But I was already way over time and the subtle shift of the block is all I could thing of XD.
The original idea had gravity and friction and I drew up a buuuunch of water animations that had to get scrapped. But overall I'm happy with how this one came out.
Thank you for playing my game =]