Hi ShadowSergal, sorry for late reply. That's really strange! Enter, Z or Space should all work. Do you already have a save file or is it your first time playing?
Agh, sorry to hear. I've just tried erasing my save data on v0.4 but I can't replicate the problem. Are you using Windows? Also, the buttons should appear "Play" "---" "---" "Settings." Does the "Play" button appear slightly larger than the "Settings" button?