Apparently, melee attackers gain exp way faster than magic attackers. When I bolted everything out of the way, I was gaining a level every 2 floors I explore. Using Crit Strike, I'm gaining around 2 levels per floor.
I love this series, although the last level was extra challenging as it was difficult to tell (for me) that the bottom colour was yellow, not orange...
Finally~ Managed to get the hard badge!
Although I've faced some problems with the arrow keys, the stick figure refused to jump sometimes when I pressed the up key. It might be a problem with my keyboard though...
But great game!
It might be easier if for the train flying exercise, the controls are the up and down arrow keys instead of left and right, since it doesn't really reflect the action on screen.