just tried it, and i played 3 hours through..
u need to be able to intepret some japanese.. there are ALOT of messages that looks dull but are in fact objectives, hints, instructions
it's addictive.. however i feel they didn't nail the controls.. the controls are quite bad.. it's easier to use buttons instead of the touchscreen.. plus i hate having to use my R button just to build something (because my shoulder buttons are very loose)
if you tried yoot tower before (not simtower), you know there are condo towers, hotel towers, shopping towers.. it's not that open ended like simtower (maybe in the beginning), but there are objectives u can achieve
there are a few touchscreen minigames right from your tower such as clearing toilets, cockroaches.. raising the efficiency of shops, and turboing your elevators
(btw the mario tower is just 2 minigames of circling your touchscreen, u don't actually build anything there, you get reward if u succeed though)
if you can play this, ya try it, it's fun