v0.2.0

Refactor

Migrated:

• From Reactstrap & Bootstrap to Material-UI (with css in js).
• (new deploy system) From gh-pages to respective GitHub Action.
• (new game feel) Add simple animation.

Improvements

• Add ASDF to keyboard layout.
• Improve a little bit performance.

New features

• Display key on tile when playing using gamepad or keyboard.
• Gamepad support.