Love the music, and the way the jelly reacts based on where you click. Also, I like the look of the UI and the different skins. As for improvements:
1. Despite the full screen toggle being on, the game starts in full screen.
2. Would be cool if the music and sounds were on by default.
3. Would be more motivating if the player knew when the next unlock will appear (next unlock at 1000 e.g.)
4. Alongside the achievements, accompanying UI text, or the inventory UI shining would be great to represent that something has been unlocked.