Here's a few things..

The menu, you don't get enough time to read the instructions. However, I noted that the instructions and the 2nd Page describing the points, only flash between each other. I would simply add in an Instructions button to replace the constant flipping.

- The game does not end, it would have been nice if that was mentioned, the "Last as long as you can" part, somewhere in the game.
- Add Some music, perhaps something light, but with the option to turn it off, and some sound effects when clicking, er, destroying the Gems.
- Consider adding a difficulty option, or maybe different types of Play modes, having only one play mode, which is basically endurance, can get very boring, very fast.
- Adding to the above suggestion, add more Gems / Shapes, different stages maybe, such as Stage 1 is, "Space" and then after so many points Stage 2 would be, "Asteroid Belt" or something like that.

It's a work in progress, I can tell, but I do think you're off to a good start. There's plenty of things you could add, and some of the things above I listed, are just some starter ideas. The game is a bit dull, but if you add more stuff, options, etc to it, I'm sure it'll do fine.