Describe the bug

The icon does not flip back.

Context

Device: Nexus 5
OS Version: Android 9.0.0
App version: 1.0.06

How to reproduce

1.Lauch memory_game
2.Select theme and difficulty
3.Click two different icons to flip
4.Click one of these two icons several times quickly when they flip back
5.Click another icon, then the icon you clicked befor

I would like to change a few things about the readme:

• make the feature list more descriptive, there seems to be be some duplicates
• remove 'use chrome' instruction. I think robotopia should work in all browsers, if that's not the case we should fix that

Thoughts?

The character and shop movement should be improved in such a way that the player wont feel restricted to "realism".
Example of good character movement would be Mario from practically any nintendo game.

How to improve:

• Character only moves (ground/air) when you are pressing movement buttons
• Character can change direction during air time
• Quicker response to movement

背景

2018/04 以降、Facebook のユーザデータ保護強化を目的とした API 仕様変更が行われ、Facebook グループのイベント情報を取得するための API 使用の制約が強くなった。
グループ API 経由でイベント情報を取得するためには、API を使用するアプリが審査を通過し、かつグループの管理者からアプリが許可を受けなければならない。

New Facebook Platform Product Changes and Policy Updates

特に「グループからアプリに許可を与えてもらうこと」は対応/サポートコストが高いため

Facebook App Dashboard notified the following message:
Your Facebook SDK is out-of-date. Please upgrade to v5.0 for access to new privacy features.
https://developers.facebook.com/docs/app-events/upgrade-guide/

any PR for the following will be accepted:

• add any language of your choice to the translations
• incorporate and new ui element in the existing translations (e.g. the new Options button)

Please make sure that the PR does NOT close this issue :) Thanks