I've no put it clearly what I meant - I understand what s does, but I sometimes hit it when I was not meant to do so (e.g. wanted to jump) - I'd rather use enter for that. But that's just a personal preference.
I understand, we used the default controls that are used in other platformer and tetris games available across the internet. Thank you for your input we might try to create a setting to customize the controls :)
