This idea is really cool, but needs a little work to take it to the next level. I had a few words that weren't recognized as words, and I don't know if I ever found any that were longer than 3 letters. I used a word finder and checked a few of the generations, and the longest combo I could find was 5. I think if damage is equal to word length, then a 7 letter word should always be possible.
Otherwise, the controls feel great, the concept is something that I would love to play in a full mobile release, and all the art fits together very well. I hope to see this one updated!