Version 2.0.0

Now can be played in normal mode and hard mode.

Hard mode is the original gameJam version, added some spice, it's harder now.

Added visual indicators for predicting movement.

Added Leaderboard using the Unity Cloud Leaderboard Services

Optimized the bird's collider to fit the shape better and avoid glitches.

Minor change to level 6 to make both boards useful.

In hard mode, the final boss UFO is more challenging.

More bug fixed.