Its ok, but I feel that it needs a few things, here are my suggestions.
First of all, some background music for the main game would make the game feel a bit better as it's a bit boring having no music apart from the title screen.
Next, some sound effects would be cool such as a collect sound, miss sound etc. to give the game a bit more fun-nes.
I also feel that it needs a bit more challenge or something, maybe some things to avoid like avoid the bombs or something.
Maybe try make the fall speed increase with each donught too, and maybe a time limit too or a 3 misses and you're out thing. just something to give it more challenge and plot to the game.
Finally, a high score system would be good so that the plot would be to beat your score.
Anyway, those are my suggestions.