wow! it took me a full hour to beat all 20 waves, but I was highly engaged the whole time. as a non-native speaker, I was experimenting a lot with what could be words, which was it's own interesting challenge (and if someone had listened to me trying to read out random letters in order to form words, they would have been worried about my mental state without a doubt).
I don't know enough about word games to know if you came up with this idea of a hexagonal grid for word strings, but it works really well to offer many possibilities even with random letters and then the RPG mechanics were really nicely implemented on top of that. I sure could have used a little reminder of all my power ups, but it was also kinda funny to stumble through my vague memory and then being surprised by how many points a 3 letter word could bring all of a sudden.
anyway, great work, I am happy so many people could play it already