UX: make it clear how to play the game in your first session

[Greenheart]

• [ ] Add instructions for how to make decisions by swiping
• [ ] Describe how you can see the consequences by swiping a little bit and holding without releasing.
• [ ] only show the instructions the first time, and then store in localStorage to prevent spamming
• [ ] Maybe add a help icon in the menu to show the instructions again.

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• What if this was an introduction in the first few cards? This way, it could be connected to the story. However, it might be better to add a general approach that can be used for all scenarios, since this makes more sense for swipeforfuture as a platform to create many different scenarios, rather than one game with only one scenario.