Heartbreaker

I mean, you see the high scores. Most people aren't getting very far in to the game because of the hugely steep difficulty curve. Level 1 is pretty challenging, when it should be a breeze. When you add the weapons, etc, it won't be as hard. But then I think you should look in to some of my other suggestions, like cutscenes and continues. Good luck!! :)

I was having a lot of trouble distinguishing between the power-ups at first (still am, sometimes) due to their all looking so similar. If you gave them each their own look, and made more of them, it would help cure some of the boredom factor of seeing the same old stuff over and over.

Nah, the first level should be over and done with a little sooner. Like, think about games where it goes like this: to clear level 1 collect 20 cherries. Level 2 is 25, Level 3 is 30, and so forth until you're having to get like 100 cherries per level to advance. Also, I would like it if there were a bigger, better "counter" of some sort in the top-middle of the screen, so I could see how many cherries I still need to collect to beat the level.

...Oh. There ARE different stages, I'm just too bad at the game to get to any of them. Maybe consider making the difficulty curve a little lower in the early levels, making more of them (for a gradual increase in difficulty), and letting me start from the beginning of the one I just died on.

ONE last thing: different levels with different shaped grids. That would make this seem like a truly polished effort. :)