Poor art, Poor put-together, etc. Make something with a story-line of sorts, or make it more intriguing and challenging.
This game was bad, lets just catch all the numbers but 8, I almost fell asleep, it had to get to like level 10 for the numbers to be falling at any decent speed at all, I got to level 14 and out of boredom started catching 8's just to see what happened,then I was told I did horrible, well I agree with that but for someone to do good they would be catching numbers for hours. It doesn't help that the 8's are red and all the rest are green, this just makes the game even more simple.
Slow and bugged.
The loading screens actually take longer than the levels itself. Not only that, on level 5 the game bugged and my score went on without changing levels. I was supposed to score 175 points, but even after I was over 215 the game changed levels.
But so far it is a bit good.
For slowyness blame Stencyl. It's still beta, but from version to version it's more and more faster, so I will continue rebuild game whenever new build will improve overall speed of Stencyl's engine. And about level changing do you mean that you've got gameover, but still could take numbers or you scored more than 175 and game changed level? If the second - this is not a bug. The condition is score>=goal score, so you can score more than goal score. You don't have score exactly as goal score.