"Escaping from Level Drain Phase"
Upon entering the tower, the enemies approach you.
If you are caught, you must attempt your best to escape
from the ensuing reverse r*pe and level draining!
The more that you are drained, the harder it will
be to escape as you grow weaker and weaker.
(If you find it too difficult, please refer to the
game hints / tips file provided in the retail version.)

"Fighting while being Level Drained Phase"
In this phase, use the mouse to fight with your enemies.
Enemies will also attempt level draining so you
may just find yourself in a game over situation.
The details are provided in the retail version's readme.