funny, but buggy...
it was fun, but i found a few bugs:
-you can't click the instruction screen away when you click it
-if the ball goes too high (low gravity) it wont come back, probably because the left and right walls aren't high enough (you can try stopping it from going to high with a ceiling, outside the screen)
-if you want you normal cursor back, by clicking X, you cursor disappears althogether
you can try fixinh this, or just think: stfu, who gives a fuck, and use it to improve later games :P
anyway, nice game ;)