It's a cheap mobile port, and that right there should say most of what is needed. The game is buggy, crashing for me and others just moving between game screens. The controls are novel, but lose their charm after the first few minutes, especially given that where the attack occurs during movement isn't clear, and it requires you to jump to dodge projectiles when there's no jump control and you practically teleport to the ground after finishing a cut in the air. The game quickly can be divided into 90% being fairly repetitive and boring, and the 9% which is loading screens, and the 1% that isn't so much "difficult" as annoying.

That is to say, save your $2 and go play a game that's better optimized and with better controls.