I like the color palette you choosed! It gives calming vibes :)
The game remind me a bit of "You are now possessed" by Lonebot, on itch.io. It's a cool concept!
To try to give something new (I only played the fullscreen windows):
-I felt a very small delay at the beginning of each level, so I had to press twice my arrow to move.
-Is there any way to leave the game other than "windows button + close the window from task bar (or alternative windows closing tools solution)"?
-On the gameplay, I wonder if the possibility of merging on a light blue tile is good? ^^ Iwas sure it would not work and was surprised it did, is it intentional?
-When will you make more levels so I can challenge myself more? :p
Very cool game, great synergy of elements! The simple gameplay makes it even better!
Good job!