Upon pressing the green flag, wait two seconds. The main screen will then come up, and you will be given further navigational instructions. You can return to the main screen any time by pressing Space. By popular request I added mobile controls. Tap the relevant grey circles instead of pressing the key (e.g. tap circle marked 'a' instead of pressing 'a' key). My sample studio: https://scratch.mit.edu/studios/30493537/ I've tried to keep the sorts of projects as balanced as possible. Some people asked me to make this a bit more creative. I'm sorry to disappoint them, but when it comes to projects like this I'm a minimalist.
The chances of the ST even noticing this, let alone accepting it, are minimal; but in submitting this I experience the greatest of all gifts, which is Hope. I don't know if I'm allowed to curate my own projects, so I'm playing it safe by assuming I'm not. I honestly don't think any of mine are worth curating anyway, except possibly my Greyscale Blockshade Cheese.