Thank you for playing ! The camera issue can be fixed on web builds by clicking 'esc' till the game pauses and pressing resume (which will capture the mouse inside the game). You can try again if you want. If it still happens on the second try, please do let me know. Thanks for the feedback too.
I have added more content to the game, especially some new areas, hazards and a new powerup and some bugfixes, if you'd like, you can give it one more try.