Go on with this
I usually give some organized thoughts through categories, but this is something you should keep going.
Pros:
-Unique concept
-Pick-up and play
-A good challenge
Cons:
-No music :(
-Only 10 Levels
This is a game that definitely deserves attention, do not let this idea die.
Here are some suggestions for the full game:
-Level Editor (I can't stress the importance of this. It boosts the replay value)
-Music (Good music, but an option to mute)
-About 50 Levels seems fine
-An "hard" mode. I would run this as: You only have 10 lives for the whole game.