There sure are some things to fix (Tutorial label placement on iPhone X, some buttons look blurry) and some behaviour that is not native (like the transition between screens), could be implemented but gives a clue that it might not be a native app.
Thanks for the kind words! Yup, fixed the tutorial button for the next release, and I should add @3x assets--I have poor vision so I forget about stuff like that.
Anyhow, the game is pretty fun!