Leap in difficulty.. never a good thing
I can recognize how you would want to usher the player in and familiarize them with the controls and techniques in your game, but the Medium levels were way too hard off the bat.
The first level of Medium took ridiculously long and felt like there was no end to it.. I completed it after about 5 minutes, thinking it was going to be the only one like that. I reached Medium level 4 and quit. Not only does the Progress Bar fill up FAR TOO SLOWLY, frustrating the player, but the game's simplicity eventually makes it boring and aggravating to play.
The music sounded like it could have been pulled from an edition of Snowboard Kids for the N64 and, although catchy at first, was a nuisance more than anything.
By the way, you know that the level towards the end of the Tutorial stages has reversed controls, right? It is probably intentional, although it seemed very amateur and moronic to have a level like that and catching the player off guard, especially when the cursor reached the edge of the screen and could barely move due to the yellow slowing and short length of the 'string-thing'.
Definitely needs fine-tuning.. actually, don't tune anything. Leave this one in the trash bin and start working on your next project. I wouldn't recommend making a sequel to this game at all, even with the criticism of this edition.
->Suspect