Sometimes if you dig too deep into game dev-ing - or anything else that takes focus to execute - it can narrow down your creative field of vision already. If you have any expectations of profit, this makes things worse by itself. Try and get your head out of the box for a while. Do something else instead. For example, read a book. I know it may be shocking. Allow yourself to waste your own time a bit. If without any idea, just sit down calmly, listen to the music you like, perhaps eventually take a walk outside. Just do not expect things to miraculously improve with the project. Infact, if you come to conclusion the entire endeavor is a big delusion or you are doing it wrong from the very beginning, you have to deal with that. Let yourself waste time openly in front of yourself, at least for some time. On a footnote, oftentimes people would either how waste their time, pretending to be busy, but doing nothing essential to progress, except becoming even more entangled in a fatal loop. Which is why, to fight this 'concealed idleness' pattern, I say, be idle simply as is, for at least it is honest and may let you see things different way.