Eternal Space

you can hold down the mouse button to make it curve twords the bottom, even at horizontal

Needs to have the cursor remain visible, otherwise it is far too easy to drag it off the game field. Alternately, add autopause, but i like that option less.

my ball went perfectly horizontal

yea

My ball is stuck... http://img2.pict.com/7c/ff/c5/3650710/0/1276369543.jpg (Chrome 6.0.427.0 dev / Mac10.5.8)