I recommend you to look at
example/ folder which contains simple application
you can use as starting point.
If you have any problem (aka bug) with the code or feature request feel to fill ticket at https://todo.sr.ht/~sgiath/spaceboy. Just don't expect I will answer or fix the ticket - I have job and family, this is just hobby I do late at night.
If you have any code you would like to include in the framework feel free to send me patch at firstname.lastname@example.org. And again don't expect I will answer quickly. Please send patches as attachements not in the email body (you will increase the chance I will be able to apply the patch easily).
If you want to use part or all of my code and do anything with it - do what the fuck you want. I don't care - if I would care I wouldn't put it publicly on the internet.