Are plurals not allowed in Scrabble? Because "Yours" and "Years" are apparently not words. Same goes for "Yodel".
That said, it's simple and fun, and that's a very good thing! Short play sessions and a simple premise make a great mobile game. I think it could do with some background music, and the ability to lower the volume of the SFX would be nice, but overall I think this is a great game! Good job!