I am addicted to this game and play it every day, but lately it's starting to become boring. Here's why:
The user generated puzzles are too easy. None of the creators use negative space at all, so once you have a complete row or two plugged in, it's really simple (and boring) to just fill out the columns color by color and not worry about gaps, since there are none.
Also, I feel irked about how many times I have payed 2 coins for what I thought was a 20X20 puzzle, only to see that there is so much space around the image that it's only 16X16. Don't leave empty rows!
The word recognition doesn't make sense enough to predict. Many times I just sat next to a letter and hit every key on the keyboard waiting for it to recognize a word. Like others have said, many of the "words" aren't words.
I fell like the platforming is only difficult because of the stickiness of the slime, and not because of clever level design. I'm quitting because I'm frustrated by getting stuck every time i graze the side of a platform.
Note to developer: forcing the gamer to land on a single empty space in the middle of spikes is STUPID. It totally took me out of the fun of the game, and now I am going to play something else. Bye bye.
This was great until the numbered shapes showed up. It's a little tricky to understand and gets really complicated really quickly. I could probably grasp the concept better if I saw the numbers on the shapes earlier.