Impressive
style : simple but the Content is perfectly work smooth
Keep it Up , I'm Looking forward for you work

Try making a modern look to the piano, or even making it look realistic or photographic. It looked like some of the text went off the edge of the playing screen in the memory game, so the screen might be expanded for a wider view.
The composer looks pretty advanced, though. Too advanced for me to know what I'm doing, so it must be a good thing. Also, where's the second "do" at on the piano? There should be one more key at the end, one note higher, like I learned back in elementary school: do re mi fa so la ti do

Clean it up here and there and you might have a decent free piano app on your hands.

7 notes? Really? Thats all?
Well, mordaza, next time add more notes on the piano because there are not many things that could be played on this. Half notes wouldn't hurt, either. And do not forget to improve quality next time (I don't mean design- design is fine. I simply think that it has too much pixelated look)!

Do all this, and I'll give you five stars.

As far as a composing and piano simulator you guys did alright. Though, you do not include any of the sharp notes and you only have one full scale. I suggest including the sharps and at least having the sharps as well. You should also consider the traditional typing hand position for the keys. Where the right hand goes from a to f and the left hand goes from j to semi-colon. This will make for more comfortable playing and you can use the row of keys Q and P for the other scales and sharps. In the compossing section it would be a benefit if you could move the time wand by dragging it with the mouse intead of having to click the arrow in the button.