So i finally finished the game. Started maybe two years ago on the DS, then switched to PSP for better performance. Had some pauses, but it was a blast, really a great little game. Ask me if you're stuck
Tower of Origin: 5:27:82
Tower of Adventure: 19:47:86
Tower of Ordeal: 55:58:06
I didn't try to improve my scores on the last tower, but the first two I did my best in most of the levels (without spending too much time).
So show me your times!