Hi Leonardo,
It's Syphis the creator of "School Boss".
You can try to play in the web browser with the following link: https://gamejolt.com/games/schoolboss/537006
It's a bit laggy but it will do the job.
Can you give me the version you were playing?
Sorry for the late reply, I have long work session today...
You can PM me at contact@syphisprod.com with screenshots or follow the discussion right here.
Hopefully I will fix your issue.