Firstly, the art in this game is incredible - it makes great use of the 1-bit palette, and is very visually stunning. There were lots of little details I liked, such as seeing the stars over the canopy of the jungle, or how the pixels for the hearts invert when they go over light/dark areas
I don't know that this would control great on an actual phone - having 12-buttons is one thing, but two sets of directional controls on a keypad would probably make for a dud control scheme on a phone - especially for an action game where timing matters
Having said that, no one is actually playing this on a phone, the attention to detail was fantastic and it was a blast to play!