So at first glance, here are some things.
- I would change the Leaderboard icon slightly to make it more clear/fit a little better
- Have the music in an object set to keep between levels, that will stop the jarring sound when entering a new level
- The “FX” text on mobile has a little bit of gray next to it.
- I managed to get stuck (twice), so I could no longer move. (This was on mobile)
- I would use JRs leaderboard example to get your top score (Otherwise it is possible to cheat and get a fake score)
Overall the game is pretty clean, good job.