Very to the point and not much deviation. Each room of the tower was almost identical, so it didn't have much variety there either. The battles were pretty easy to get through, except for the ghost enemies. If you run out of magic, you have little chance to defeat them so you HAVE to run.
Suggestion: Vary up the tower floors, and maybe give a boss per switch or floor, like the Lava monster. Also, allow equipping more than one gadget so you can both heal AND have offensive skills at the same time on a single character and not have to choose between the two.