I played all the yellow leves, gave up on the first pink one and also on the second blue one
The first levels were nice (1-6 should have being the last level of the yellow group. since it was the longest of the group, it really felt more importante than the others, and to beat it only to have... another short level and than it's over... it felt a little anti-climatic)
Now, this may be a me problem, because, I don't have a mouse.
I'm playing in a notebook that has a touchpad, so playing with my right hand in the middle of keyboard while having my left hand in the far right trying to hit the "enter" key at the right moments while also needing to move and precisely click on small square that was "still" but was actually moving all over the screen because the camera kept following this ball...
It was just... harder than I think you meant it to be
(or I just suck)
There was some neat tunes in there, like the main menu song was catchy
The visuals were fun and fine, could be improved upon on