Interesting idea.
Since the first couple levels are pretty much tutorial, it might be better if you only need 25 candies per pumpkin; at 100 each, it kind of felt like 'line it up and wait'.
Level 3 felt a bit like a jump in difficulty at first. However, while there was movement, moving too much was detrimental. This level was also more about find the sweet spot and then not moving until the pumpkin was full.
Level 7 was pretty large jump in difficulty because of the short windows of opportunity to fill the moving pumpkin. Maybe the candy corns on this level could have been worth 3 points each or something.
The music really added to the frantic feel of the levels where there was some challenge and tight timing.
Nice submission.