iDestroy Tower Demo

I have not finished my game yet, but put a demo version up on the site. Please check it out and let me know what you think and what I can fix.
Heres the link:
http://gamesalad.com/game/play/41443
Heres the link:
http://gamesalad.com/game/play/41443
Comments
What things need improvement?
Yeah, im deffinately adding more levels, I will have about 50 before I submit it to the App Store.
you insert in avery stage one score and when push block change attribute in -1 ? and for checking when BLOCK is "0" after 2 sec chage scene??
Thankss
Yes, I have gravity in every scene.
And for the "blocks remaining" i have a global integer game attribute. In each scene, though, in the actor that contains the "blocks remaining" i just change the number to the amount I want it at for each scene. Then in each of the blocks, when they are destroyed, I have a 'change attribute' then i do blockCount-1.
For the checking. I have an actor, and when the attribute 'blockCount' = 0, i have a display text "checking" for 7 seconds, then display text "congrats" after 7.1 seconds, then change scene after 10 seconds.
I'm not too good at explaining things, so if you need something clairified just ask.
@tshirt-adding triangles and octagons would make it very interesting! If that happens, I won't steal your idea for if I make a second version of my game.
Did anyone else notice this? And what could be causing it. It does it on level 2,4,5 and thats all I checked.
When will you be getting this game out on the iPhone??