I just remembered. In my browser(Chrome, full-size, my monitor is 1920x1080) I also couldn't see the game, there was only a black screen. However, when I resized the chrome with the CTRL+mouse wheel, the game was visible. Also, full screen works fine but I had to read the description to find the fullscreen button.
Viewing post in hyper_storm_zero jam comments
thanks, maybe ill put up a splash screen before the title with controls or something next time. it was in the how to play menu, but itd probably be good to throw the basic stuff up by default. seems like html always has little problems like this lol, literally no idea how to fix them though. thanks for the feedback!