Krystal Tower a logic game :). Main game idea maybe is a bit weird but after a few minutes of playing it can be clean.
Detailed instruction you can find in the game - press H key during the game.
Game maybe is not so easy, sometimes you have to be really fast and a few seconds later work in hurry can bad end the game. But don't worry IT'S possible to finish it :)). Any questions ? Contact me I'll try answer.
Original music and sound effects provided by grogon.com.