I like the idea of combing an overall game with some smaller mini-games. Something which ties the different pieces together is a bit missing. The next things I would do to improve the game:
- Frame rate. Not sure if it was a deliberate choice, but the game feels as it runs at a very slow frame. This makes it not very smooth and does not feel so responsive. If you just use the stuff from Phaser (update functions etc.) out of the box, this should be pretty easy to improve.
- Improve the graphics (maybe by using an asset pack, in case you are not so into art) and add some audio.
- Maybe a little story which helps to give the things you do a bit more purpose.
Anyway, congratulations to your game! I know what it means to finish a game in such a short time.