Yeah, the keyboard ruins the fun I had playing this. It took 2-3 taps per letter on my phone for keys to register.

If you use the built in keyboard I imagine you have to continuously deal with the page resizing to avoid the keyboard, and potentially people not having easy access to an English keyboard.

The custom keyboard makes all the tools you need a first class component of the game.

But yes, it's currently a little clunky.