Although this game is a real Christmas Present, i miss the old towers - especially the "You-shall-not-pass"-Guys :) Would be great if there will be a sequel, where you can upgrade all 4 types. ;)
it's annoying, that my both shields were used when i entered the wrong door, cause by resetting you get placed imeadiately in front of the last door you entered - would be nice, if you reset at the entrance