Almost gave up on this game because I was completely stumped at the beginning - I'm so glad I returned to it! It gets more and more interesting and clever as you progress.
Small ending spoiler (rot13): V zhfg'ir tbggra nobhg 90% bs gur jnl guebhtu gur tnzr orsber ernyvfvat V qvqa'g xabj jung gur jva pbaqvgvba jbhyq ybbx yvxr. Jbexvat gung bhg jnf n ernyyl sha zbzrag!