Congrats to you first Phaser game. I really liked the pixel art! I think there are a few things you could improve:
- I would lower the size of your game on the itch.io page, as it appeared pretty huge on my screen and it was hard to find the "run game" button.
- I think the music starts again when you restart the game. Keep in mind that in Phaser the music is global and does not stop when the scene stops. Especially for background music which you loop, I would always check if it is already running. I usually do it this way:
if (!this.sound.get('music').isPlaying) {
this.sound.get('music').play({loop: true});
} - I think the game is pretty difficult. Especially for a game jam, where people usually do not spend more than a few minutes playing the game, you should ensure it is very easy. Keep in mind that you play tested it quite a bit and you are very good at it. If it feels very easy for you, then it is usually ok for others :).
Anyway, nice game. Keep it up!