Did you happen to play on browser? We forced the game to open in fullscreen which we thought had fixed the issue. And if you mean a restart button in levels then yes its the R button. If you mean to clear ur save then unfortunately no we did not add that yet :/
Viewing post in Ring of The Phoenix jam comments
I checked on it again. I have seen when you click on the game window once it just happens to go to fullscreen. If you exit fullscreen there is probably no way of reactivating fullscreen again. I think you can set the presentation Template in unity to default instead of minimal if you want people to just fullscreen now and then.