You may need to click on the game again to have the mouse lock into the middle of the screen. I found this as an issue since this is running in a browser.
Sorry to hear that you had an issue with the camera. During gameplay the camera should look around with the mouse. You may need to click on the game again to get the mouse locked back into the game. I had some issues with the cursor speed and potentially this may be due to mouse sensitivity as well. I am going to take a look into this and in the future I am going to look into having some mouse sensitivity settings. Thank you for giving it a try though <3
