Nice game! I like the twist on the theme (connect to walls) and the music is very good! I think some animations were nice (eg the tornado and the walls with blood) but the overall look of the levels could be improved. And... more levels! ;)
I figured that leaving people wanting more levels would be better than nobody finishing the game ;) I'm really glad you liked the music! It is actually the first song I've ever composed. Same story for the animations. Man, this comment made my day :D