hmm pretty cool

but, it is also pretty boring. also, there should be an indication e.g. red numbers on the score when your ball hits the other one so it is more obvious.

Not bad at all.

Nice physics you got there. One suggection though mate, I was playing it on a laptop touch pad and it was very difficult. Maybe add difficulty settings with different speeds and stuff?

Interesting

A good puzzle game, simple graphics and simple sound, basic gameplay.

hmm yeah it was fun...

well its kinda funny game but it could do more.
first thing i noticed. when you the grey ball hits the bleu one ( the one which you have to controll ) you loose ALL your points. maybe thats to much. and the dragging got a bit annoying in the end. maybe you should try to make the cursor the bleu ball. that might work. also i havent really '' completed'' the game but so far you might include some intresting negative and positive powerups.
like
-no walls for 30 secs so it just swoops back instead of bouncing against the wall
- grey and bleu ball are switched so you only have to get to the nearest point but it might backfire because when it switches back.....
-slowmotion?
-the grey ball gets bigger
-short or no elastic chord/rope between the balls ( that sounds just weird )
well i bet you could think of more. keep it up. hoping you take my advice and make a better second version ;)

-firebolt-

not bad

general idea is good. The sound effects are lame and after the game ends, it doesn't tell you the score. it could be better if you had added levels and more things to increase complexity and effects to make it less visually boring. All in all, it seems to be an original and fun idea.