Single-direction only controlled by mouse-click which is too slow = swing and a miss.
Too many red spikey things split you up, too many "you're fucked" moments where you have zero chance of escape, and you can't last long enough to get more than a few single digit gold blocks. Some blobs split unexpectedly into two even without needing to collide with the red spikeys.
Worst of all: crappy collision physics. I can "dodge" around those giant sun blobss by floating between the rays... nope. It eats me still, even though I clearly didn't touch it. Th-thanks.
Your "Three game modes" are all the freaking same. THEY'RE ALL THE SAME.
It would take hours upon hours to unlock all those balls, and none seem to be any different than any other.
Nice graphics, needs to be better though. There's no reason to buy new balls because they're all the same, and it's just a game of luck with a bit of strategy vs. bad design.