I tried several times to get the mouse cursor to lock to the screen in firefox without success. But in Chrome it worked on the first try!
It'll do for a first try! Good job on getting it done!
It's a lovely premise for a game. Once the mouse was actually locked in place I had a nice time flitting from flower to flower. I found that the best strategy was space for some height and then gliding, while the left mouse option of up and forward took too much energy and left me with too much momentum to stick the landings.
The music is very fitting for a relaxing time, though it isn't set to loop so once it's played it's done for the rest of the session.