Ironically, I was the first to decry NWR's "Recommended For Everyone" rating for Kid Icarus way back
when.
However, in comparison to Kid Icarus, I definitely feel like Tower Toppler is the good sort of hard. For instance, if I remember correctly, falling down off the screen in Kid Icarus is lethal. In Tower Toppler, you always have the chance to recover as long as you have time and don't fall into the sea. Tower Toppler is, in my opinion, very fair and upfront about when you make a mistake, which is encouraging to play. Other difficult games are, frustratingly, much more punishing.