Really nice game you made.
The music adds a lot to the atmosphear o the game.
For some feedback:
- It is good that there is an audio playing when the player picks up a coin, because it gives him/ her easy feedback
- Currently I coundn't see what the main goal was besides collecting coins. If you put an extra goal people will be more engaged to reach this goal. so maybe you can come up with one.
- The animation for the player character is great as it makes it feal more alive.
Keep it up :)