First of all, absolutely love the little animations on the main menu screen, as it sets the mood for the rest of the game. The choice between single and multiplayer mode also provides more in term of replay value.
The key issue I faced was with the layout where the white text would appear on top of light parts of the bg, or on top of existing text:
Adding an outline to the text would improve readability and overall accessibility.
Again, love the animations and characters. The attention to detail when it comes to the two songs makes the work engaging overall.
Great job!
:)